FDIC-ASSISTED ACQUIRED LOANS - Consolidated Statements of Income (Details)	3 Months Ended
Mar. 31, 2021 USD ($)
FDIC-ASSISTED ACQUIRED LOANS
Remaining accretable yield adjustment	$ 1,300,000
Expected interest income	$ 900,000

Represents the amount of interest income on remaining accretable yield adjustment.

No definition available.

Name:	gsbc_InterestIncomeRemainingAccretableYieldAdjustment
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration