Loans and Allowance for Loan Losses - CARES Act (Details) $ in Millions	Dec. 31, 2021 USD ($)
Consumer and Mortgage Loans
CARES Act Loan Modifications	$ 1.2

Represents the monetary amount of CARES Act Loan Modifications, as of the indicated date.

No definition available.

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