v3.23.2

Notes Payable (Details) - Schedule of long-term notes payable (Parentheticals) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2023 | Jun. 30, 2022
Notes Payable [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 4.00% |
Maturity date | June 26, 2020 | July 7, 2026
Interest rate | 3.00% |
Monthly installments | $ 4,405 |
Principal and interest |  | $ 4,405
Notes Payable [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 4.00%
Maturity date |  | June 26, 2020
Interest rate |  | 3.00%
Monthly installments |  | $ 4,405
Notes Payable One [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% |
Maturity date | February 28, 2023 |
Monthly installments | $ 30,000 |
Expiring term | May 2022 |
Issued at a discount | $ 60,000 |
Increase principals | 30,000 |
Investor | $ 360,000 |
Notes Payable One [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Maturity date |  | February 28, 2023
Monthly installments |  | $ 30,000
Expiring term |  | May 2022
Issued at a discount |  | $ 60,000
Increase principals |  | 30,000
Investor |  | $ 360,000
Notes Payable Two [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% | 12.00%
Maturity date | March 18, 2023 | February 28, 2023
Monthly installments | $ 22,558 | $ 30,000
Expiring term | May 2022 |
Issued at a discount | $ 24,450 |
Increase principals |  | $ 30,000
Notes Payable Two [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Maturity date |  | March 18, 2023
Monthly installments |  | $ 22,558
Expiring term |  | May 2022
Issued at a discount |  | $ 24,450
Notes Payable Three [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Maturity date |  | March 18, 2023
Monthly installments |  | $ 22,558
Issued at a discount | 9,510 |
Installment payments | 9,941 |
Investor payments | $ 88,760 |
Notes Payable Three [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Issued at a discount |  | 9,510
Installment payments |  | 9,941
Investor payments |  | $ 88,760
Notes Payable Four [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% | 12.00%
Maturity date |  | May 26, 2023
Issued at a discount | $ 49,500 |
Investor payments | 59,250 |
Payments of due | 62,438 |
Notes payable | $ 450,000 |
Principal and interest |  | $ 120,185
Common stock (in Shares) |  | 750,000
Notes Payable Four [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Issued at a discount |  | $ 49,500
Investor payments |  | 59,250
Payments of due |  | 62,438
Notes payable |  | $ 450,000
Notes Payable Five [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% | 12.00%
Maturity date | May 26, 2023 |
Expiring term | May 2022 |
Issued at a discount |  | $ 60,000
Increase principals | $ 146,667 |
Principal and interest | $ 120,185 |
Common stock (in Shares) | 750,000 |
Principal amount | $ 1,350,000 |
Note payable due |  | $ 600,000
Exercise price (in Dollars per share) |  | $ 0.5
Notes Payable Five [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Maturity date |  | May 26, 2023
Expiring term |  | May 2022
Increase principals |  | $ 146,667
Principal and interest |  | $ 120,185
Common stock (in Shares) |  | 750,000
Principal amount |  | $ 1,350,000
Notes Payable Six [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% | 11.00%
Issued at a discount | $ 60,000 | $ 49,500
Payments of due |  | $ 62,438
Common stock (in Shares) | 600,000 |
Principal amount | $ 600,000 |
Note payable due | $ 600,000 |
Exercise price (in Dollars per share) | $ 0.5 |
Notes Payable Six [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Issued at a discount |  | $ 60,000
Common stock (in Shares) |  | 600,000
Principal amount |  | $ 600,000
Note payable due |  | $ 600,000
Exercise price (in Dollars per share) |  | $ 0.5
Notes Payable Seven [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 11.00% | 3.75%
Issued at a discount | $ 49,500 |
Payments of due | 62,438 |
Notes payable | $ 450,000 |
Principal and interest |  | $ 731
Expiring |  | May, 2050
Notes Payable Seven [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 11.00%
Issued at a discount |  | $ 49,500
Payments of due |  | 62,438
Notes payable |  | $ 450,000
Notes Payable Eight [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% |
Common stock (in Shares) | 1,000,000 |
Principal amount | $ 810,000 |
Exercise price (in Dollars per share) | $ 0.01 |
Notes Payable Eight [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Common stock (in Shares) |  | 1,000,000
Principal amount |  | $ 810,000
Exercise price (in Dollars per share) |  | $ 0.01
Notes Payable Nine [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 12.00% |
Maturity date | November 8,2023 |
Monthly installments |  | $ 679
Issued at a discount | $ 310,000 |
Principal amount | $ 310,000 |
Interest percentage |  | 8.99%
Debt term |  | 6 years
Notes Payable Nine [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 12.00%
Maturity date |  | November 8,2023
Issued at a discount |  | $ 310,000
Principal amount |  | $ 310,000
Notes Payable Eleven [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate | 3.75% |
Principal and interest | $ 731 |
Expiring | May 2050 |
Notes Payable Eleven [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Bearing interest rate |  | 3.75%
Principal and interest |  | $ 731
Expiring |  | May 2050
Notes Payable Twelve [Member] |  |
Debt Instrument [Line Items] |  |
Maturity date | December 2024 |
Monthly installments | $ 22,810 |
Notes Payable Twelve [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments range | 245 |
Notes Payable Twelve [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments range | 9,664 |
Notes Payable Twelve [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Maturity date |  | December 2024
Monthly installments |  | $ 22,810
Notes Payable Twelve [Member] | Previously Reported [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments range |  | 245
Notes Payable Twelve [Member] | Previously Reported [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments range |  | 9,664
Notes Payable Thirteen [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments | $ 679 |
Expiring term | December 2025 |
Interest percentage | 8.99% |
Debt term | 6 years |
Notes Payable Thirteen [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments |  | $ 679
Expiring term |  | December 2025
Interest percentage |  | 8.99%
Debt term |  | 6 years
Notes Payable Fourteen [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments | $ 948 |
Expiring term | January 2027 |
Interest percentage | 5.90% |
Debt term | 6 years |
Notes Payable Fourteen [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments |  | $ 948
Expiring term |  | January 2027
Interest percentage |  | 5.90%
Debt term |  | 6 years
Notes Payable Fifteen [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments | $ 844 |
Expiring term | August 2025 |
Interest percentage | 6.00% |
Debt term | 4 years |
Notes Payable Fifteen [Member] | Previously Reported [Member] |  |
Debt Instrument [Line Items] |  |
Monthly installments |  | $ 844
Expiring term |  | August 2025
Interest percentage |  | 6.00%
Debt term |  | 4 years

X
- Definition The percentage of bearing interest. + References No definition available. + Details
Name: | gaxy_BearingInterestRate
Namespace Prefix: | gaxy_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The shares of common stock. + References No definition available. + Details
Name: | gaxy_CommonStock
Namespace Prefix: | gaxy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt term. + References No definition available. + Details
Name: | gaxy_DebtTerm
Namespace Prefix: | gaxy_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price. + References No definition available. + Details
Name: | gaxy_ExercisePrice
Namespace Prefix: | gaxy_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expiring. + References No definition available. + Details
Name: | gaxy_Expiring
Namespace Prefix: | gaxy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiring term. + References No definition available. + Details
Name: | gaxy_ExpiringTerm
Namespace Prefix: | gaxy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of increase principals. + References No definition available. + Details
Name: | gaxy_IncreasePrincipals
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The installment payments. + References No definition available. + Details
Name: | gaxy_InstallmentPayments
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of interest. + References No definition available. + Details
Name: | gaxy_InterestPercentage
Namespace Prefix: | gaxy_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate on notes payable. + References No definition available. + Details
Name: | gaxy_InterestRate
Namespace Prefix: | gaxy_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Investor payments. + References No definition available. + Details
Name: | gaxy_InvestorPayments
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The date of maturity. + References No definition available. + Details
Name: | gaxy_MaturityDate
Namespace Prefix: | gaxy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of monthly installments. + References No definition available. + Details
Name: | gaxy_MonthlyInstallments
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Monthly installments range. + References No definition available. + Details
Name: | gaxy_MonthlyInstallmentsRange
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of note payable due. + References No definition available. + Details
Name: | gaxy_NotePayableOfDue
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. + References No definition available. + Details
Name: | gaxy_NotesPayableInvestor
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of payments of due. + References No definition available. + Details
Name: | gaxy_PaymentsOfDue
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of principal and interest. + References No definition available. + Details
Name: | gaxy_PrincipalAndInterest
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69F Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-4 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of principal of investment owned. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480493/946-210-55-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 + Details
Name: | us-gaap_InvestmentOwnedBalancePrincipalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of long-term notes classified as other, payable after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_OtherLongTermNotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayablesOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableElevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableFourteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableFifteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |