OTHER REAL ESTATE OWNED AND REPOSSESSIONS - Schedule of Expenses Applicable to Foreclosed Assets (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
OTHER REAL ESTATE OWNED AND REPOSSESSIONS.
Net gains on sales of other real estate owned and repossessions	$ (5)	$ (1)	$ (148)	$ (169)
Valuation write-downs			23	83
Operating expenses, net of rental income	89	104	438	559
Expenses on real estate and repossessions	$ 84	$ 103	$ 313	$ 473

Represents the monetary amount of Net (gain) loss on sales of other real estate owned, during the indicated time period.

No definition available.

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