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DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair value, assets and liabilities measured on nonrecurring basis (Details) - Collateral-dependent loans - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Nonrecurring Measurements
Fair value measurement of assets	$ 194	$ 785
Level 3
Nonrecurring Measurements
Fair value measurement of assets	$ 194	$ 785

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- Definition

Represents the monetary amount of Non-recurring Assets, Fair Value Disclosure, as of the indicated date.

+ References

No definition available.

+ Details

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Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- 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

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

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: