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    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_E28A5FA9BBB0529202013A68BF30CEFC_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_E28A5FA9BBB0529202013A68BF30CEFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
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    <link:label id="lab_gpor_AmendedAndRestatedCreditAgreementMember_827C7360B657CE05CD4F3A68BF3039F8_label_en-US" xlink:label="lab_gpor_AmendedAndRestatedCreditAgreementMember_827C7360B657CE05CD4F3A68BF3039F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amended And Restated Credit Agreement [Member]</link:label>
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    <link:loc xlink:href="gpor-20161231.xsd#gpor_AmendedAndRestatedCreditAgreementMember" xlink:label="loc_gpor_AmendedAndRestatedCreditAgreementMember_827C7360B657CE05CD4F3A68BF3039F8" xlink:type="locator" />
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    <link:label id="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03_terseLabel_en-US" xlink:label="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Refinanced Building Loan</link:label>
    <link:label id="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03_label_en-US" xlink:label="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Refinanced Building Loan [Member]</link:label>
    <link:label id="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03_documentation_en-US" xlink:label="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Refinanced Building Loan [Member]</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_RefinancedBuildingLoanMember" xlink:label="loc_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:to="lab_gpor_RefinancedBuildingLoanMember_F338679F5F2A47C085473A68BF31BA03" xlink:type="arc" />
    <link:label id="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467_terseLabel_en-US" xlink:label="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">7.75% Senior notes 2020</link:label>
    <link:label id="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467_label_en-US" xlink:label="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">7.75% Senior Notes [Member]</link:label>
    <link:label id="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467_documentation_en-US" xlink:label="lab_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">7.75% Senior Notes [Member]</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_A7.75SeniorNotesMember" xlink:label="loc_gpor_A7.75SeniorNotesMember_0DC9855E5864FF2E51EA3A68BF31C467" xlink:type="locator" />
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    <link:label id="lab_gpor_A6.625SeniorNotesMember_F795B3E674BADA131FFE3A68BF310F48_label_en-US" xlink:label="lab_gpor_A6.625SeniorNotesMember_F795B3E674BADA131FFE3A68BF310F48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">6.625% Senior Notes [Member]</link:label>
    <link:label id="lab_gpor_A6.625SeniorNotesMember_F795B3E674BADA131FFE3A68BF310F48_documentation_en-US" xlink:label="lab_gpor_A6.625SeniorNotesMember_F795B3E674BADA131FFE3A68BF310F48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">6.625% Senior Notes [Member]</link:label>
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    <link:label id="lab_gpor_A6.000SeniorNotesMember_B06D233C8FD058B521C23A68BF310743_documentation_en-US" xlink:label="lab_gpor_A6.000SeniorNotesMember_B06D233C8FD058B521C23A68BF310743" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">6.000% Senior Notes [Member]</link:label>
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    <link:label id="lab_gpor_A6.375SeniorNotesMember_423809408B5DD07D4DB33A68BF313224_documentation_en-US" xlink:label="lab_gpor_A6.375SeniorNotesMember_423809408B5DD07D4DB33A68BF313224" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">6.375% Senior Notes [Member]</link:label>
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    <link:label id="lab_gpor_DebtInstrumentBasisSpreadonVariableRateIncreaseDecreaseDuringPeriod_D53D680D5E4F2CD69C353A68BF333D04_terseLabel_en-US" xlink:label="lab_gpor_DebtInstrumentBasisSpreadonVariableRateIncreaseDecreaseDuringPeriod_D53D680D5E4F2CD69C353A68BF333D04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis spread increase</link:label>
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    <link:label id="lab_gpor_DebtInstrumentDispositionCostsMaximumExpensesAllowed_9FCCE4A37D5E188B3C883A68BF33B92F_terseLabel_en-US" xlink:label="lab_gpor_DebtInstrumentDispositionCostsMaximumExpensesAllowed_9FCCE4A37D5E188B3C883A68BF33B92F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disposition costs, maximum expenses allowed</link:label>
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    <link:label id="lab_gpor_DebtInstrumentCovenantComplianceFutureEarningsBeforeIncomeTaxDepreciationDepletionAmortizationandExplorationExpensesRatio_32532D1BAF05AE1B99993A68BF343B4C_terseLabel_en-US" xlink:label="lab_gpor_DebtInstrumentCovenantComplianceFutureEarningsBeforeIncomeTaxDepreciationDepletionAmortizationandExplorationExpensesRatio_32532D1BAF05AE1B99993A68BF343B4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt covenant ratio for future EBITDAX</link:label>
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    <link:label id="lab_gpor_DebtInstrumentCovenantComplianceEarningsBeforeIncomeTaxDepreciationDepletionAmortizationAndExplorationExpensesRatio_B1A84AD3FDA6E3BF834D3A68BF3486BF_terseLabel_en-US" xlink:label="lab_gpor_DebtInstrumentCovenantComplianceEarningsBeforeIncomeTaxDepreciationDepletionAmortizationAndExplorationExpensesRatio_B1A84AD3FDA6E3BF834D3A68BF3486BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt covenant ratio for EBITDAX</link:label>
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    <link:label id="lab_gpor_PurchasingRemainingPercentInterestInOilAndGasProperty_BC7E7BFA1D7EC88EC8F23D064C2EB7F7_label_en-US" xlink:label="lab_gpor_PurchasingRemainingPercentInterestInOilAndGasProperty_BC7E7BFA1D7EC88EC8F23D064C2EB7F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchasing Remaining Percent Interest In Oil And Gas Property</link:label>
    <link:label id="lab_gpor_PurchasingRemainingPercentInterestInOilAndGasProperty_BC7E7BFA1D7EC88EC8F23D064C2EB7F7_documentation_en-US" xlink:label="lab_gpor_PurchasingRemainingPercentInterestInOilAndGasProperty_BC7E7BFA1D7EC88EC8F23D064C2EB7F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Purchasing remaining percent interest in oil and gas property.</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_PurchasingRemainingPercentInterestInOilAndGasProperty" xlink:label="loc_gpor_PurchasingRemainingPercentInterestInOilAndGasProperty_BC7E7BFA1D7EC88EC8F23D064C2EB7F7" xlink:type="locator" />
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    <link:label id="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA_terseLabel_en-US" xlink:label="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Monthly payments to abandonment trust obligation</link:label>
    <link:label id="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA_label_en-US" xlink:label="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments Held For Restricted Cash</link:label>
    <link:label id="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA_documentation_en-US" xlink:label="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">payments to plugging and abandonment escrow account.</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_PaymentsHeldForRestrictedCash" xlink:label="loc_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:to="lab_gpor_PaymentsHeldForRestrictedCash_6C08812EF7995A1914C43D064C2EB5EA" xlink:type="arc" />
    <link:label id="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42_terseLabel_en-US" xlink:label="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plugging commitment, minimum number of wells to be plugged</link:label>
    <link:label id="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42_label_en-US" xlink:label="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Significant Plugging Commitment Minimum Number Of Wells To Be Plugged</link:label>
    <link:label id="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42_documentation_en-US" xlink:label="lab_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Minimum number of wells required to be plugged annually.</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged" xlink:label="loc_gpor_SignificantPluggingCommitmentMinimumNumberOfWellsToBePlugged_F336E0416FD0A3351A903D064C2E0F42" xlink:type="locator" />
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    <link:label id="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1_terseLabel_en-US" xlink:label="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Period of well plugging commitment</link:label>
    <link:label id="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1_label_en-US" xlink:label="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tenure Of Minimum Wells To Be Plugged</link:label>
    <link:label id="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1_documentation_en-US" xlink:label="lab_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tenure of minimum wells to be plugged</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_TenureOfMinimumWellsToBePlugged" xlink:label="loc_gpor_TenureOfMinimumWellsToBePlugged_C243EE6D8B4B603A9BC03D064C2E5BD1" xlink:type="locator" />
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    <link:label id="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162_verboseLabel_en-US" xlink:label="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Plugging and abandonment escrow account on the WCBB properties (Note 15)</link:label>
    <link:label id="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162_label_en-US" xlink:label="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plugging And Abandonment Escrow Account</link:label>
    <link:label id="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162_documentation_en-US" xlink:label="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plugging And Abandonment Escrow Account</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_PluggingAndAbandonmentEscrowAccount" xlink:label="loc_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:to="lab_gpor_PluggingAndAbandonmentEscrowAccount_D1AF1CDFF204F64584E53D064C2E7162" xlink:type="arc" />
    <link:label id="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12_terseLabel_en-US" xlink:label="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of wells plugged to date</link:label>
    <link:label id="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12_label_en-US" xlink:label="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Wells Plugged</link:label>
    <link:label id="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12_documentation_en-US" xlink:label="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Wells Plugged</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_NumberOfWellsPlugged" xlink:label="loc_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:to="lab_gpor_NumberOfWellsPlugged_5C2C4982D25D34F299123D064C2E9B12" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum annual contributions per employee (401K Plan)</link:label>
    <link:label id="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:label="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9" xlink:to="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_37446535AF5D68F5E51C3D064C2FABB9" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum matching employer contribution for 401K</link:label>
    <link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7" xlink:to="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_72E47E278B71329D8FA93D064C2F7ED7" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost recognized on defined contribution plan</link:label>
    <link:label id="lab_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Contribution Plan, Cost Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE" xlink:to="lab_us-gaap_DefinedContributionPlanCostRecognized_718FAFCD2AF0E15928513D064C2FAEEE" xlink:type="arc" />
    <link:label id="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243_terseLabel_en-US" xlink:label="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employment agreement term</link:label>
    <link:label id="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243_label_en-US" xlink:label="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employment Agreement, Term</link:label>
    <link:label id="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243_documentation_en-US" xlink:label="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employment Agreement, Term</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_EmploymentAgreementTerm" xlink:label="loc_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:to="lab_gpor_EmploymentAgreementTerm_F4AAFC844F1CA914AA9D3D064C2F8243" xlink:type="arc" />
    <link:label id="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B_terseLabel_en-US" xlink:label="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Period of employment automatic extension</link:label>
    <link:label id="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B_label_en-US" xlink:label="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employment Agreement, Subsequent Extension</link:label>
    <link:label id="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B_documentation_en-US" xlink:label="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employment Agreement, Subsequent Extension</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_EmploymentAgreementSubsequentExtension" xlink:label="loc_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:to="lab_gpor_EmploymentAgreementSubsequentExtension_1F6A24C6A3979578CF563D064C2FE39B" xlink:type="arc" />
    <link:label id="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84_terseLabel_en-US" xlink:label="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employment agreement, notice period allowed for termination</link:label>
    <link:label id="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84_label_en-US" xlink:label="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employment Agreement, Notice Period Allowed For Termination</link:label>
    <link:label id="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84_documentation_en-US" xlink:label="lab_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employment Agreement, Notice Period Allowed For Termination</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_EmploymentAgreementNoticePeriodAllowedForTermination" xlink:label="loc_gpor_EmploymentAgreementNoticePeriodAllowedForTermination_56FE8F033E9740A11F1C3D064C2FFA84" xlink:type="locator" />
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    <link:label id="lab_gpor_PostEmploymentBenefitsEligibilityTerm_5A88D61CC0F2BBE452153D064C2F90CF_terseLabel_en-US" xlink:label="lab_gpor_PostEmploymentBenefitsEligibilityTerm_5A88D61CC0F2BBE452153D064C2F90CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Post employment benefits, eligibility term</link:label>
    <link:label id="lab_gpor_PostEmploymentBenefitsEligibilityTerm_5A88D61CC0F2BBE452153D064C2F90CF_label_en-US" xlink:label="lab_gpor_PostEmploymentBenefitsEligibilityTerm_5A88D61CC0F2BBE452153D064C2F90CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Post Employment Benefits, Eligibility, Term</link:label>
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    <link:label id="lab_gpor_MarathonOilCorporationMember_266819CD9DDBED65908926B7EF4224A4_terseLabel_en-US" xlink:label="lab_gpor_MarathonOilCorporationMember_266819CD9DDBED65908926B7EF4224A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marathon Oil Corporation</link:label>
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    <link:loc xlink:href="gpor-20161231.xsd#gpor_HessMember" xlink:label="loc_gpor_HessMember_0E91171B9F02EEC887E426B7EF426DE6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OilReservesMember_A2FBBB4B2CB2ADD60A7F26B7EF42DD6B_terseLabel_en-US" xlink:label="lab_us-gaap_OilReservesMember_A2FBBB4B2CB2ADD60A7F26B7EF42DD6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Oil derivatives</link:label>
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    <link:label id="lab_us-gaap_NaturalGasLiquidsReservesMember_3103D4D3CE63E04D1A8B26B7EF426441_terseLabel_en-US" xlink:label="lab_us-gaap_NaturalGasLiquidsReservesMember_3103D4D3CE63E04D1A8B26B7EF426441" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Natural gas liquids</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NaturalGasLiquidsReservesMember" xlink:label="loc_us-gaap_NaturalGasLiquidsReservesMember_3103D4D3CE63E04D1A8B26B7EF426441" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NaturalGasPerThousandCubicFeetMember_E7E5B0238FD35A1CB11126B7EF425976_terseLabel_en-US" xlink:label="lab_us-gaap_NaturalGasPerThousandCubicFeetMember_E7E5B0238FD35A1CB11126B7EF425976" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Natural gas, per MMbtu</link:label>
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    <link:label id="lab_gpor_ConversionRatioGasToBarrelsOfOil_4F5430A7406947C024C83CA637166E2E_terseLabel_en-US" xlink:label="lab_gpor_ConversionRatioGasToBarrelsOfOil_4F5430A7406947C024C83CA637166E2E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion ratio, gas to barrels of oil</link:label>
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    <link:label id="lab_gpor_ConversionRatioGasToBarrelsOfOil_4F5430A7406947C024C83CA637166E2E_documentation_en-US" xlink:label="lab_gpor_ConversionRatioGasToBarrelsOfOil_4F5430A7406947C024C83CA637166E2E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Conversion Ratio, Gas To Barrels Of Oil</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_ConversionRatioGasToBarrelsOfOil" xlink:label="loc_gpor_ConversionRatioGasToBarrelsOfOil_4F5430A7406947C024C83CA637166E2E" xlink:type="locator" />
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    <link:label id="lab_gpor_BisonDrillingAndFieldServicesLlcMember_9F452906BB523D0F97DA3958186FED01_terseLabel_en-US" xlink:label="lab_gpor_BisonDrillingAndFieldServicesLlcMember_9F452906BB523D0F97DA3958186FED01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in Bison Drilling and Field Services LLC</link:label>
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    <link:label id="lab_gpor_MuskieHoldingsLlcMember_81F9CF38DF28FFBBCE423958186FFAA1_verboseLabel_en-US" xlink:label="lab_gpor_MuskieHoldingsLlcMember_81F9CF38DF28FFBBCE423958186FFAA1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investment in Muskie Proppant LLC</link:label>
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    <link:label id="lab_gpor_TimberWolfTerminalsLlcMember_8F06F9EC70FFB36BFA233958186F0137_terseLabel_en-US" xlink:label="lab_gpor_TimberWolfTerminalsLlcMember_8F06F9EC70FFB36BFA233958186F0137" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in Timber Wolf Terminals LLC</link:label>
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    <link:label id="lab_us-gaap_PlanNameDomain_6F27BDDEA6D53BC42B712A1D1DD76677_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain_6F27BDDEA6D53BC42B712A1D1DD76677" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Name [Domain]</link:label>
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    <link:label id="lab_gpor_TwoThousandFiveStockIncentivePlanMember_F0E526905F4C8EC9B50E2A1D1DE6C5D2_documentation_en-US" xlink:label="lab_gpor_TwoThousandFiveStockIncentivePlanMember_F0E526905F4C8EC9B50E2A1D1DE6C5D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two Thousand Five Stock Incentive Plan [Member]</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_TwoThousandFiveStockIncentivePlanMember" xlink:label="loc_gpor_TwoThousandFiveStockIncentivePlanMember_F0E526905F4C8EC9B50E2A1D1DE6C5D2" xlink:type="locator" />
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    <link:label id="lab_gpor_NineteenNinetyNineStockOptionPlanMember_E2E1E65E607F95C01D922A1D1DE60B50_terseLabel_en-US" xlink:label="lab_gpor_NineteenNinetyNineStockOptionPlanMember_E2E1E65E607F95C01D922A1D1DE60B50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1999 Stock Option Plan</link:label>
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    <link:label id="lab_gpor_GasAndOilAreaNet_B6847C7214A2921BE2F00086A6F194EF_documentation_en-US" xlink:label="lab_gpor_GasAndOilAreaNet_B6847C7214A2921BE2F00086A6F194EF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas And Oil Area, Net</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_GasAndOilAreaNet" xlink:label="loc_gpor_GasAndOilAreaNet_B6847C7214A2921BE2F00086A6F194EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_GasAndOilAreaNet_B6847C7214A2921BE2F00086A6F194EF" xlink:to="lab_gpor_GasAndOilAreaNet_B6847C7214A2921BE2F00086A6F194EF" xlink:type="arc" />
    <link:label id="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6_terseLabel_en-US" xlink:label="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross and net acquired oil and gas acreage (in acres)</link:label>
    <link:label id="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6_label_en-US" xlink:label="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gas And Oil Area, Gross And Net</link:label>
    <link:label id="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6_documentation_en-US" xlink:label="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas And Oil Area, Gross And Net</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_GasAndOilAreaGrossAndNet" xlink:label="loc_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:to="lab_gpor_GasAndOilAreaGrossAndNet_D151C48EE9C31096FA0E0086A6F2E4D6" xlink:type="arc" />
    <link:label id="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1_terseLabel_en-US" xlink:label="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross oil and gas acreage acquired (in acres)</link:label>
    <link:label id="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1_label_en-US" xlink:label="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gas And Oil Area, Gross</link:label>
    <link:label id="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1_documentation_en-US" xlink:label="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas And Oil Area, Gross</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_GasAndOilAreaGross" xlink:label="loc_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:to="lab_gpor_GasAndOilAreaGross_226D659C0B494362E9DA0086A6F213D1" xlink:type="arc" />
    <link:label id="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98_terseLabel_en-US" xlink:label="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net average per day production volume (MMcf)</link:label>
    <link:label id="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98_label_en-US" xlink:label="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Oil And Gas Delivery Commitments And Contracts, Daily Production, Volume</link:label>
    <link:label id="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98_documentation_en-US" xlink:label="lab_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Volume of daily production of the applicable energy source.</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume" xlink:label="loc_gpor_OilAndGasDeliveryCommitmentsAndContractsDailyProductionVolume_3C0B2E30DDF481D843330086A6F2FD98" xlink:type="locator" />
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    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6_terseLabel_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross number of wells acquired</link:label>
    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6_label_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Productive Oil And Gas Wells, Number Of Wells, Gross</link:label>
    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6_documentation_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Productive Oil And Gas Wells, Number Of Wells, Gross</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_ProductiveOilAndGasWellsNumberOfWellsGross" xlink:label="loc_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:to="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsGross_11E6EC2936207B200D150086A6F2B5F6" xlink:type="arc" />
    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3_terseLabel_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net number of wells acquired</link:label>
    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3_label_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Productive Oil And Gas Wells, Number Of Wells, Net</link:label>
    <link:label id="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3_documentation_en-US" xlink:label="lab_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Productive Oil And Gas Wells, Number Of Wells, Net</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_ProductiveOilAndGasWellsNumberOfWellsNet" xlink:label="loc_gpor_ProductiveOilAndGasWellsNumberOfWellsNet_17755B72F1BE1452A5B90086A6F20DD3" xlink:type="locator" />
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    <link:label id="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59_terseLabel_en-US" xlink:label="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Length of gas gathering transportation</link:label>
    <link:label id="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59_label_en-US" xlink:label="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gas Gathering, Transportation, Length</link:label>
    <link:label id="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59_documentation_en-US" xlink:label="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gas Gathering, Transportation, Length</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_GasGatheringTransportationLength" xlink:label="loc_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:to="lab_gpor_GasGatheringTransportationLength_5C868561A6A7977224090086A6F22F59" xlink:type="arc" />
    <link:label id="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF_terseLabel_en-US" xlink:label="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of well pad locations</link:label>
    <link:label id="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF_label_en-US" xlink:label="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Locations For Productive Wells</link:label>
    <link:label id="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF_documentation_en-US" xlink:label="lab_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Locations For Productive Wells</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_NumberOfLocationsForProductiveWells" xlink:label="loc_gpor_NumberOfLocationsForProductiveWells_F4021F174455713E19020086A6F2A6AF" xlink:type="locator" />
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    <link:label id="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF_terseLabel_en-US" xlink:label="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash, net of purchase price adjustments</link:label>
    <link:label id="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF_label_en-US" xlink:label="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment to Acquire Oil and Gas Property and Equipment, Net</link:label>
    <link:label id="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF_documentation_en-US" xlink:label="lab_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payment to Acquire Oil and Gas Property and Equipment, Net</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet" xlink:label="loc_gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet_FF1CFECCEEC562F95B5F0086A6F196CF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInRestrictedCash_8785EFDA670045444EBB0086A6F25AEF_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInRestrictedCash_8785EFDA670045444EBB0086A6F25AEF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deductions to cash held in escrow</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="loc_us-gaap_IncreaseDecreaseInRestrictedCash_8785EFDA670045444EBB0086A6F25AEF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_3AA7CE28EC12C7567A730086A6F1381E_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_3AA7CE28EC12C7567A730086A6F1381E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_3AA7CE28EC12C7567A730086A6F1381E_label_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_3AA7CE28EC12C7567A730086A6F1381E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Acquired During Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_3AA7CE28EC12C7567A730086A6F1381E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_AE274A7BEFEE5298A96B00C967AC2678_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_AE274A7BEFEE5298A96B00C967AC2678" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bargain purchase gain</link:label>
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    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentTextBlock_0AD91475E55C0613EC92390F8B2C67EB_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentTextBlock_0AD91475E55C0613EC92390F8B2C67EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment</link:label>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentTextBlock_0AD91475E55C0613EC92390F8B2C67EB_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentTextBlock_0AD91475E55C0613EC92390F8B2C67EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Table Text Block]</link:label>
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    <link:label id="lab_gpor_InterestIncomeNoteReceivable_508D932A24872ACD0FB83958345EA5FE_label_en-US" xlink:label="lab_gpor_InterestIncomeNoteReceivable_508D932A24872ACD0FB83958345EA5FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income - Note Receivable</link:label>
    <link:label id="lab_gpor_InterestIncomeNoteReceivable_508D932A24872ACD0FB83958345EA5FE_documentation_en-US" xlink:label="lab_gpor_InterestIncomeNoteReceivable_508D932A24872ACD0FB83958345EA5FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Noncash interest income associated with note receivable.  As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.</link:label>
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    <link:label id="lab_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_C1868AA84451206294153958345E1A16_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_C1868AA84451206294153958345E1A16" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss (gain) on derivative instruments</link:label>
    <link:label id="lab_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_C1868AA84451206294153958345E1A16_label_en-US" xlink:label="lab_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_C1868AA84451206294153958345E1A16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet" xlink:label="loc_us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet_C1868AA84451206294153958345E1A16" xlink:type="locator" />
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    <link:label id="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57_terseLabel_en-US" xlink:label="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income tax expense (benefit)</link:label>
    <link:label id="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57_label_en-US" xlink:label="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit) Including Discontinued Operations</link:label>
    <link:label id="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57_documentation_en-US" xlink:label="lab_gpor_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations_6FD7DE9069C12DFA2F0D3958345ECD57" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit) Including Discontinued Operations</link:label>
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    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_A65CDE08EA7CC4D1FA9D3958345F5374_verboseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_A65CDE08EA7CC4D1FA9D3958345F5374" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortization of loan commitment fees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_A65CDE08EA7CC4D1FA9D3958345F5374" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_33E22DD67687A3AF71313958345F676B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">(Increase) decrease in accounts receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_01F24E532AEF3C5AF4473958345F90B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Decrease in accounts receivable&#8212;related party</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable, Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_4540377305AF65498A1F3958345FF75E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Increase in prepaid expenses</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Prepaid Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B" xlink:to="lab_us-gaap_IncreaseDecreaseInPrepaidExpense_5EE24919683BF349B4FB3958345F203B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in accounts payable and accrued liabilities and other</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_8DBC92215F5C9EE1A8393958345F8549" xlink:type="arc" />
    <link:label id="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52_terseLabel_en-US" xlink:label="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Settlement of asset retirement obligation</link:label>
    <link:label id="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52_label_en-US" xlink:label="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Asset Retirement Obligation</link:label>
    <link:label id="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52_documentation_en-US" xlink:label="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) In Asset Retirement Obligation</link:label>
    <link:loc xlink:href="gpor-20161231.xsd#gpor_IncreaseDecreaseInAssetRetirementObligation" xlink:label="loc_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:to="lab_gpor_IncreaseDecreaseInAssetRetirementObligation_9451E3A461C14A03BBFF3958345F5B52" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_21F4AB8836B239D28A373958345F8EBB_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_21F4AB8836B239D28A373958345F8EBB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) operating activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_21F4AB8836B239D28A373958345F8EBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_21F4AB8836B239D28A373958345F8EBB" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_21F4AB8836B239D28A373958345F8EBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_7B0A585CB987889A36413958345FF15F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Deductions to cash held in escrow</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) of Restricted Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseOfRestrictedInvestments" xlink:label="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B" xlink:to="lab_us-gaap_IncreaseDecreaseOfRestrictedInvestments_088AD61A21852670346C3958345F503B" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_ED3E6A578047957B3C583958345F3C18_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_ED3E6A578047957B3C583958345F3C18" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Additions to other property and equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_ED3E6A578047957B3C583958345F3C18_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_ED3E6A578047957B3C583958345F3C18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Other Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment_ED3E6A578047957B3C583958345F3C18" xlink:type="locator" />
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