Represents information pertaining to former branch.

No definition available.

Name:	gsbc_AmountOfOneFormerBranchLocation
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the monetary amount of Valuation write-downs on foreclosed assets, during the indicated time period.

+ References

No definition available.

+ Details

Name:	gsbc_ValuationWriteDownsOnForeclosedAssets
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-35

+ Details

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=gsbc_FormerBranchMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Other Real Estate Owned and Repossessions (Details)	12 Months Ended
Other Real Estate Owned and Repossessions (Details)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)
Other Real Estate Owned and Repossessions
Valuation write-downs	$ 81,000	$ 23,000	$ 211,000
Former branch
Other Real Estate Owned and Repossessions
Amount of one former branch location	2
Number of real estate properties \| property		2
Valuation write-downs		$ 0
Residential mortgage
Other Real Estate Owned and Repossessions
Mortgage loans in process of foreclosure, amount	$ 0	$ 173,000