Name:	gsbc_DepositsLineItems
Namespace Prefix:	gsbc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The weighted average rate on interest-bearing brokered deposits.

No definition available.

Name:	gsbc_InterestBearingDomesticDepositBrokeredWeightedAverageRate
Namespace Prefix:	gsbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Represents the Weighted average interest rate on certificates of deposit, as of the indicated date.

No definition available.

Name:	gsbc_WeightedAverageInterestRateOnCertificatesOfDeposit
Namespace Prefix:	gsbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The weighted average rate on interest-bearing demand and savings deposits.

No definition available.

Name:	gsbc_WeightedAverageRateOnInterestBearingDemandAndSavingsDeposits
Namespace Prefix:	gsbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The amount of money in accounts that may bear interest and that the depositor is entitled to withdraw at any time without prior notice.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Name:	us-gaap_DemandDepositAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The aggregate of all domestic interest-bearing and noninterest-bearing deposit liabilities.

Name:	us-gaap_DepositsDomestic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The aggregate of all domestic and foreign interest-bearing deposit liabilities.

Name:	us-gaap_InterestBearingDepositLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

Name:	us-gaap_InterestBearingDomesticDepositBrokered
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.

Name:	us-gaap_NoninterestBearingDepositLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of time deposit liabilities, including certificates of deposit.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481047/942-405-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Name:	us-gaap_TimeDeposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_InterestBearingDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_Between0.90And0.12Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_N000099Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_N100199Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_N200299Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_N300399Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ScheduleOfReceivablesWithImputedInterestNameOfReceivableWithImputedInterestAxis=gsbc_N400499Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: