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  <xsd:element id="good_NonCashCapitalImprovementsIncludedInAccountsPayableAndAccruedExpenses" name="NonCashCapitalImprovementsIncludedInAccountsPayableAndAccruedExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_NoncontrollingInterestOwnershipbyNoncontrollingOwnersNumberofShares" name="NoncontrollingInterestOwnershipbyNoncontrollingOwnersNumberofShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NoticePeriodForTerminationOfAgreementWithCause" name="NoticePeriodForTerminationOfAgreementWithCause" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NoticePeriodForTerminationOfAgreementWithoutCause" name="NoticePeriodForTerminationOfAgreementWithoutCause" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberOfExistingEncumberedProperties" name="NumberOfExistingEncumberedProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberOfLeasedProperties" name="NumberOfLeasedProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberOfLongTermMortgagesRepaid" name="NumberOfLongTermMortgagesRepaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberOfMortgageNotesPayable" name="NumberOfMortgageNotesPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberOfPropertiesAcquired" name="NumberOfPropertiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberOfRealEstatePropertiesHeldForSale" name="NumberOfRealEstatePropertiesHeldForSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberofExecutiveOfficers" name="NumberofExecutiveOfficers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberofImpairedAssetsHeldandUsed" name="NumberofImpairedAssetsHeldandUsed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberofImpairedAssetsSoldHeldforSale" name="NumberofImpairedAssetsSoldHeldforSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="good_NumberofLongTermMortgagesMaturitiesExtended" name="NumberofLongTermMortgagesMaturitiesExtended" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberofNonCorePropertiesSold" name="NumberofNonCorePropertiesSold" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberofPropertiesRepaidToCollateralizedMortgageNotesPayable" name="NumberofPropertiesRepaidToCollateralizedMortgageNotesPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberofPropertiesthatCollateralizeMortgageNotesPayable" name="NumberofPropertiesthatCollateralizeMortgageNotesPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="good_NumberofQuartersUsedfortheCapofAverageQuarterlyIncentiveFees" name="NumberofQuartersUsedfortheCapofAverageQuarterlyIncentiveFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_OcalaFloridaOneMember" name="OcalaFloridaOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_OcalaFloridaTwoMember" name="OcalaFloridaTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_OperatingLeaseLiabilityIncurred" name="OperatingLeaseLiabilityIncurred" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_PaymentOfFinancingFee" name="PaymentOfFinancingFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_PaymentsToAcquireRealEstateAndIntangibleAssets" name="PaymentsToAcquireRealEstateAndIntangibleAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_PaymentsToLendersForReservesHeldInEscrow" name="PaymentsToLendersForReservesHeldInEscrow" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_PaymentsToTenantsFromReserves" name="PaymentsToTenantsFromReserves" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_PercentageOfFinancingFeeToAmountOfMortgage" name="PercentageOfFinancingFeeToAmountOfMortgage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="good_PercentageOfIncentiveFeesOnCapitalGains" name="PercentageOfIncentiveFeesOnCapitalGains" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="good_PercentageofIndependentDirectorsRequiredtoTerminatetheAmendedAdvisoryAgreement" name="PercentageofIndependentDirectorsRequiredtoTerminatetheAmendedAdvisoryAgreement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_PhiladelphiaPennsylvaniaMember" name="PhiladelphiaPennsylvaniaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_ProceedsFromDepositsAppliedAgainstAcquisitionOfRealEstateInvestments" name="ProceedsFromDepositsAppliedAgainstAcquisitionOfRealEstateInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="good_PropertyHeldforsaleSellingCosts" name="PropertyHeldforsaleSellingCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_PropertyMaturingFebruary82029Member" name="PropertyMaturingFebruary82029Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_PropertyMaturingJune12024Member" name="PropertyMaturingJune12024Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_PropertyMaturingJune182024Member" name="PropertyMaturingJune182024Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_PropertyOperatingExpenses" name="PropertyOperatingExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="good_PurchasePriceOfAcquiredProperty" name="PurchasePriceOfAcquiredProperty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="good_QuarterlyBaseManagementFeeInPercentageOfStockholdersEquityAdjustedToUnrealizedGainsOrLosses" name="QuarterlyBaseManagementFeeInPercentageOfStockholdersEquityAdjustedToUnrealizedGainsOrLosses" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="good_QuarterlyFinancialInformationPolicyPolicyTextBlock" name="QuarterlyFinancialInformationPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_QuarterlyIncentiveFeePerAdvisoryAgreement" name="QuarterlyIncentiveFeePerAdvisoryAgreement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="good_RealEstateAndIntangibleAssetsDisclosureTextBlock" name="RealEstateAndIntangibleAssetsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_RealEstateHeldForSaleMember" name="RealEstateHeldForSaleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_ReceiptsFromLendersForReservesHeldInEscrow" name="ReceiptsFromLendersForReservesHeldInEscrow" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="good_ReceiptsFromTenantsForReserves" name="ReceiptsFromTenantsForReserves" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="good_ScheduleOfComponentsOfIncomeFromRealEstateAndRelatedAssetsDispositionsTableTextBlock" name="ScheduleOfComponentsOfIncomeFromRealEstateAndRelatedAssetsDispositionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_ScheduleOfRealEstateOwnedHeldForSaleTableTableTextBlock" name="ScheduleOfRealEstateOwnedHeldForSaleTableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_ScheduleofRepaidDebtTableTextBlock" name="ScheduleofRepaidDebtTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_SecuredMortgagesFinancingFeePercent" name="SecuredMortgagesFinancingFeePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="good_SeniorCommonStockAuthorizedUnissued" name="SeniorCommonStockAuthorizedUnissued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="good_SeniorCommonStockMember" name="SeniorCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_SeniorCommonStockParValue" name="SeniorCommonStockParValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="good_SeniorCommonStockSharesAuthorized" name="SeniorCommonStockSharesAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="good_SeniorCommonStockSharesIssued" name="SeniorCommonStockSharesIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="good_SeniorCommonStockSharesOutstanding" name="SeniorCommonStockSharesOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="good_SeniorCommonStocks" name="SeniorCommonStocks" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="good_SeriesAAndSeriesBPreferredStockMember" name="SeriesAAndSeriesBPreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_SeriesACumulativeRedeemablePreferredStockMember" name="SeriesACumulativeRedeemablePreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_SeriesBCumulativeRedeemablePreferredStockMember" name="SeriesBCumulativeRedeemablePreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_SeriesDCumulativeRedeemablePreferredStockMember" name="SeriesDCumulativeRedeemablePreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_SeriesofPropertyAcquisitionsMember" name="SeriesofPropertyAcquisitionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_SummaryOfPropertiesAcquiredTableTextBlock" name="SummaryOfPropertiesAcquiredTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_TemporaryEquityContractTermsMinimumVoteNeededtoTriggerChangeinControlFromTenderOffer" name="TemporaryEquityContractTermsMinimumVoteNeededtoTriggerChangeinControlFromTenderOffer" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="good_TenantImprovementMember" name="TenantImprovementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_TermLoanFacilityMember" name="TermLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_TerminationFeePayableasPercentageofAverageAnnualManagementFeeandIncentiveFeeDuringTwentyFourMonthPeriod" name="TerminationFeePayableasPercentageofAverageAnnualManagementFeeandIncentiveFeeDuringTwentyFourMonthPeriod" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_TiftonGeorgiaMember" name="TiftonGeorgiaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_UniversalRegistrationStatementAmountAuthorized" name="UniversalRegistrationStatementAmountAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="good_VanceAlabamaMember" name="VanceAlabamaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_VariableRateLineofCreditMember" name="VariableRateLineofCreditMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_VariableRateMortgageLoansDebtExtendedMember" name="VariableRateMortgageLoansDebtExtendedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_VariableRateMortgagesMember" name="VariableRateMortgagesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="good_VariableRateTermLoanFacilityMember" name="VariableRateTermLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="good_WeightedAverageAmortizationPeriodForIntangibleAssetsAcquiredTableTextBlock" name="WeightedAverageAmortizationPeriodForIntangibleAssetsAcquiredTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="good_WeightedAverageSharesOfSeniorCommonStockOutstandingBasic" name="WeightedAverageSharesOfSeniorCommonStockOutstandingBasic" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
</xsd:schema>
