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  <xsd:element id="gbci_MaximumPeriodofOriginalMaturitytobeIncludedinCashandCashEquivalents" name="MaximumPeriodofOriginalMaturitytobeIncludedinCashandCashEquivalents" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumAgeRequiredToBeConsideredEligibleForPlan" name="MinimumAgeRequiredToBeConsideredEligibleForPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumNumberOfHoursRequiredToBeConsideredEligibleForEmployerDiscretionaryContribution" name="MinimumNumberOfHoursRequiredToBeConsideredEligibleForEmployerDiscretionaryContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" name="MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumNumberofDaysDelinquenttoChargeoffConsumerLoans" name="MinimumNumberofDaysDelinquenttoChargeoffConsumerLoans" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumPeriodPastDuetoConsiderLoanasDelinquent" name="MinimumPeriodPastDuetoConsiderLoanasDelinquent" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumPeriodPastDuetoConsiderLoanasNonAccrual" name="MinimumPeriodPastDuetoConsiderLoanasNonAccrual" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumRateToExercisePutOption" name="MinimumRateToExercisePutOption" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="gbci_MiscellaneousEmployeeExpenses" name="MiscellaneousEmployeeExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_MontanaCommunityBanksMember" name="MontanaCommunityBanksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_MontanaMember" name="MontanaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesTextualAbstract" name="NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesTextualAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_NetCashReceivedPaidForAcquisitionOfBanks" name="NetCashReceivedPaidForAcquisitionOfBanks" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="gbci_NonMarketableEquitySecuritiesPolicyTextBlock" name="NonMarketableEquitySecuritiesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_NonmarketableSecuritiesEquitySecurities" name="NonmarketableSecuritiesEquitySecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_NorthCascadesBancsharesMember" name="NorthCascadesBancsharesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_NumberOfBankDivisions" name="NumberOfBankDivisions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="gbci_NumberOfOfficersInEmploymentContract" name="NumberOfOfficersInEmploymentContract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_NumberOfReportingUnitsSubsequentToAggregationForGoodwillAssessment" name="NumberOfReportingUnitsSubsequentToAggregationForGoodwillAssessment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="gbci_NumberofStepstoAchieveCoreRevenueRecognitionPrincipal" name="NumberofStepstoAchieveCoreRevenueRecognitionPrincipal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_Numberofyearsforhomeequityloanoriginationterm" name="Numberofyearsforhomeequityloanoriginationterm" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueAbstract" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter" name="OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_OtherRealEstateOwnedFairValueDisclosure" name="OtherRealEstateOwnedFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_OtherRealEstateOwnedMember" name="OtherRealEstateOwnedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_OverdraftDemandDepositsReclassifiedAsLoans" name="OverdraftDemandDepositsReclassifiedAsLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_PaymentsForLoansOriginatedOrAcquired" name="PaymentsForLoansOriginatedOrAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="gbci_PaymentsForProceedsFromNonMarketableEquitySecurities" name="PaymentsForProceedsFromNonMarketableEquitySecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="gbci_PercentageOfBonusesAndDirectorsFeesForDeferralOfCashPayments" name="PercentageOfBonusesAndDirectorsFeesForDeferralOfCashPayments" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_PercentageOfConsolidatedStockholdersEquityExceedingWhichNoBorrowerHadOutstandingLoansOrCommitments" name="PercentageOfConsolidatedStockholdersEquityExceedingWhichNoBorrowerHadOutstandingLoansOrCommitments" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="gbci_PercentageOfEmployeesContributionRequiredToDetermineMatchedAmountUnderPlan" name="PercentageOfEmployeesContributionRequiredToDetermineMatchedAmountUnderPlan" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_PercentageOfLikelihoodForTermMoreLikelyThanNot" name="PercentageOfLikelihoodForTermMoreLikelyThanNot" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_PercentageOfSalaryForDeferralOfCashPayments" name="PercentageOfSalaryForDeferralOfCashPayments" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_PeriodOfEmploymentRequiredToBeEligibleForPlan" name="PeriodOfEmploymentRequiredToBeEligibleForPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_PremisesAndEquipmentNetTextualAbstract" name="PremisesAndEquipmentNetTextualAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_PriorYearAcquisitionsMember" name="PriorYearAcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_ProceedsFromPaymentsForFederalHomeLoanBankAdvances" name="ProceedsFromPaymentsForFederalHomeLoanBankAdvances" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="gbci_RealEstateAcquiredThroughForeclosureSecuredbyResidentialRealEstate" name="RealEstateAcquiredThroughForeclosureSecuredbyResidentialRealEstate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_RelatedPartyRentExpense" name="RelatedPartyRentExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_SalesComparisonApproachValuationTechniqueMember" name="SalesComparisonApproachValuationTechniqueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_ScheduleOfFutureMinimumRentalPaymentsForOperatingAndCapitalLeasesTableTextBlock" name="ScheduleOfFutureMinimumRentalPaymentsForOperatingAndCapitalLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_ScheduledMaturitiesOfCertificatesOfDepositTableTextBlock" name="ScheduledMaturitiesOfCertificatesOfDepositTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_ScheduleofMarketableSecuritiesLineItems" name="ScheduleofMarketableSecuritiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_ScheduleofMarketableSecuritiesTable" name="ScheduleofMarketableSecuritiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_SecuritiesGrossUnrealizedGainAccumulatedinInvestments" name="SecuritiesGrossUnrealizedGainAccumulatedinInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments" name="SecuritiesGrossUnrealizedLossAccumulatedinInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTaxBenefit" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTaxBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="gbci_SizeOfCompanyEligibleForTier1GrandfatherProvision" name="SizeOfCompanyEligibleForTier1GrandfatherProvision" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_StatementOfOperationsAbstract" name="StatementOfOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_SubsidiaryIncomeInExcessOfLessThanDividendsDistributed" name="SubsidiaryIncomeInExcessOfLessThanDividendsDistributed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_SummaryOfImpairedLoansByPortfolioClassOfLoansAbstract" name="SummaryOfImpairedLoansByPortfolioClassOfLoansAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_SummaryOfRecordedInvestmentInLoansAndAlllOnPortfolioClassBasisTableTextBlock" name="SummaryOfRecordedInvestmentInLoansAndAlllOnPortfolioClassBasisTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_SummaryofTaxCreditCarryforwardsAbstract" name="SummaryofTaxCreditCarryforwardsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_SupplementalEmployeeRetirementPlansMember" name="SupplementalEmployeeRetirementPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TdrWithPreModificationLoanBalanceForWhichOreoWasReceived" name="TdrWithPreModificationLoanBalanceForWhichOreoWasReceived" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_TelephoneExpenses" name="TelephoneExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="gbci_TemporaryVersusOtherThanTemporaryImpairmentPolicyTextBlock" name="TemporaryVersusOtherThanTemporaryImpairmentPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_TermsOfSubordinatedDebenturesAbstract" name="TermsOfSubordinatedDebenturesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TermsOfSubordinatedDebenturesTableTextBlock" name="TermsOfSubordinatedDebenturesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TimeDepositsThatMeetorExceedFDICInsuranceLimit" name="TimeDepositsThatMeetorExceedFDICInsuranceLimit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_UtahMember" name="UtahMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_VIEWritedownsLossesandOtherExpenses" name="VIEWritedownsLossesandOtherExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountInterestPayable" name="VariableInterestEntityConsolidatedCarryingAmountInterestPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountInterestReceivable" name="VariableInterestEntityConsolidatedCarryingAmountInterestReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountLoansandLeasesReceivableNetofDeferredIncome" name="VariableInterestEntityConsolidatedCarryingAmountLoansandLeasesReceivableNetofDeferredIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountOtherAssets" name="VariableInterestEntityConsolidatedCarryingAmountOtherAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountOtherBorrowings" name="VariableInterestEntityConsolidatedCarryingAmountOtherBorrowings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountOtherLiabilities" name="VariableInterestEntityConsolidatedCarryingAmountOtherLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_VariableInterestEntityConsolidatedCarryingAmountPropertyPlantandEquipmentNet" name="VariableInterestEntityConsolidatedCarryingAmountPropertyPlantandEquipmentNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_WeightedAverageInterestRateOnLoans" name="WeightedAverageInterestRateOnLoans" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gbci_WheatlandBanksharesMember" name="WheatlandBanksharesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_WholesaleDepositsIncludedInTimeDeposits" name="WholesaleDepositsIncludedInTimeDeposits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
</xsd:schema>
