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  <xsd:element id="gbci_IntercompanyChargesForServices" name="IntercompanyChargesForServices" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="gbci_InterestExpenseFederalHomeLoanBankAdvance" name="InterestExpenseFederalHomeLoanBankAdvance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_InterestRateSwapOneMember" name="InterestRateSwapOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_InterestRateSwapTwoMember" name="InterestRateSwapTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_InvestmentsinSubsidiaries" name="InvestmentsinSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustTextBlock" name="JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_LettersofCreditMember" name="LettersofCreditMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_LoanRelatedExpenses" name="LoanRelatedExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_LowIncomeHousingTaxCreditMember" name="LowIncomeHousingTaxCreditMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MaximumNumberofConsecutiveQuartersforDeferralofInterestPaymentsonTrustPreferredSecurities" name="MaximumNumberofConsecutiveQuartersforDeferralofInterestPaymentsonTrustPreferredSecurities" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MaximumPeriodUpToWhichPurchasePriceOfBusinessIsAllocatedToAssetsAcquiredAndLiabilitiesAssumed" name="MaximumPeriodUpToWhichPurchasePriceOfBusinessIsAllocatedToAssetsAcquiredAndLiabilitiesAssumed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MaximumPeriodofOriginalMaturitytobeIncludedinCashandCashEquivalents" name="MaximumPeriodofOriginalMaturitytobeIncludedinCashandCashEquivalents" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_Maximumleasetermtonotrecognizeleaseassetsandliabilities" name="Maximumleasetermtonotrecognizeleaseassetsandliabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" 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_MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" name="MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" 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_MinimumPeriodPastDuetoConsiderLoansasDelinquent" name="MinimumPeriodPastDuetoConsiderLoansasDelinquent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_MinimumPeriodPastDuetoConsiderLoansasNonAccrual" name="MinimumPeriodPastDuetoConsiderLoansasNonAccrual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <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_MontanaMember" name="MontanaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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 id="gbci_NumberOfBankDivisions" name="NumberOfBankDivisions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <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_Numberofequitybasedcompensationarrangementplans." name="Numberofequitybasedcompensationarrangementplans." nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_Numberofstepsincludedingoodwillimpairmenttest" name="Numberofstepsincludedingoodwillimpairmenttest" 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 abstract="true" id="gbci_OperatingLossandTaxCreditCarryforwardsLineItems" name="OperatingLossandTaxCreditCarryforwardsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_OperatingLossandTaxCreditCarryforwardsTable" name="OperatingLossandTaxCreditCarryforwardsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <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:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_PeriodtobegindevelopingandimplementingprocessesandproceduresforFASBUpdate" name="PeriodtobegindevelopingandimplementingprocessesandproceduresforFASBUpdate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" 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_ProceedsfromPaymentsforShortTermFederalHomeLoanBankAdvances" name="ProceedsfromPaymentsforShortTermFederalHomeLoanBankAdvances" 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 abstract="true" id="gbci_RetirementPlanEmployeeAgeAxis" name="RetirementPlanEmployeeAgeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_RetirementPlanEmployeeAgeDomain" name="RetirementPlanEmployeeAgeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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="credit" xbrli:periodType="instant" />
  <xsd:element id="gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments1" name="SecuritiesGrossUnrealizedLossAccumulatedinInvestments1" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" 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_SupplementalEmployeeRetirementPlansMember" name="SupplementalEmployeeRetirementPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TaxCreditCompliancePeriod" name="TaxCreditCompliancePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TaxCreditPeriod" name="TaxCreditPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" 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 abstract="true" id="gbci_TheFoothillsBankMember" name="TheFoothillsBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gbci_TierOneCommonCapitalAbstract" name="TierOneCommonCapitalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_TierOneCommonCapitalRequiredforCapitalAdequacytoRiskWeightedAssets" name="TierOneCommonCapitalRequiredforCapitalAdequacytoRiskWeightedAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="gbci_TierOneCommonCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets" name="TierOneCommonCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <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_TreasureStateBankMember" name="TreasureStateBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gbci_UnamortizedDiscountsandPremiumsonLoans" name="UnamortizedDiscountsandPremiumsonLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="gbci_UnamortizedLoanOriginationFeesandCosts" name="UnamortizedLoanOriginationFeesandCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" 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_VariableInterestEntitiesInvestmentAmortization" name="VariableInterestEntitiesInvestmentAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="gbci_WeightedAverageInterestRateOnLoans" name="WeightedAverageInterestRateOnLoans" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
</xsd:schema>
