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    <element id="GCTK_ExchangeAgreementMember" name="ExchangeAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ReceiptsOnAccountOfShares" name="ReceiptsOnAccountOfShares" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_FinancingIncomeExpenseNet" name="FinancingIncomeExpenseNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_AdjustmentsToAdditionalPaidInCapitalDeemedDividendResultedFromTriggerOfDownRoundProtectionFeatureOfCertainWarrantsGranted" name="AdjustmentsToAdditionalPaidInCapitalDeemedDividendResultedFromTriggerOfDownRoundProtectionFeatureOfCertainWarrantsGranted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_IssuanceOfRestrictedSharesAsCompensationToBoardOfDirectors" name="IssuanceOfRestrictedSharesAsCompensationToBoardOfDirectors" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_LinkageDifferenceOnPrincipalOfLoansFromStockholders" name="LinkageDifferenceOnPrincipalOfLoansFromStockholders" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ProceedsReceivedFromUnderwrittenPublicOffering" name="ProceedsReceivedFromUnderwrittenPublicOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_DisclosureGeneralAndAdministrativeExpensesAbstract" name="DisclosureGeneralAndAdministrativeExpensesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_GeneralAndAdministrativeExpensesTextBlock" name="GeneralAndAdministrativeExpensesTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_FunctionalCurrencyPolicyTextBlock" name="FunctionalCurrencyPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_RoyaltyBearingGrantsPolicyTextBlock" name="RoyaltyBearingGrantsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ModificationOfEquityClassifiedContractsPolicyTextBlock" name="ModificationOfEquityClassifiedContractsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ScheduleOfPropertyRatesOfDepreciationTableTextBlock" name="ScheduleOfPropertyRatesOfDepreciationTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ScheduleOfResearchAndDevelopmentExpensesTableTextBlock" name="ScheduleOfResearchAndDevelopmentExpensesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ScheduleOfGeneralAndAdministrativeExpensesTableTextBlock" name="ScheduleOfGeneralAndAdministrativeExpensesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_DeemedDividendRelatedToTriggerOfDownRoundProtectionFeature" name="DeemedDividendRelatedToTriggerOfDownRoundProtectionFeature" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_WeightedAverageNumberOfCommonStockOutstandingUsedInComputingBasicNetLossPerShare" name="WeightedAverageNumberOfCommonStockOutstandingUsedInComputingBasicNetLossPerShare" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_WeightedAverageNumberOfCommonStockOutstandingUsedInComputingDilutedNetLossPerShare" name="WeightedAverageNumberOfCommonStockOutstandingUsedInComputingDilutedNetLossPerShare" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_QuarterlyPaymentsEqualsToSalesPercentage" name="QuarterlyPaymentsEqualsToSalesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_RoyaltyPercentage" name="RoyaltyPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_AggregateSalesPriceOfUnitsPercentage" name="AggregateSalesPriceOfUnitsPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_DiscountForMarketabilityPercentage" name="DiscountForMarketabilityPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm1" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm1" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm3" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm3" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExerciableInPeriodIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExerciableInPeriodIntrinsicValue" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_DeferredTaxAssetsTaxVacationAccrual" name="DeferredTaxAssetsTaxVacationAccrual" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_DeferredTaxAssetValuationAllowance" name="DeferredTaxAssetValuationAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_LockUpPeriodDescription" name="LockUpPeriodDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="GCTK_PropertyPlantAndEquipmentDepreciationRate" name="PropertyPlantAndEquipmentDepreciationRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
</schema>
