Document And Entity Information - shares	6 Months Ended
	Sep. 30, 2024	Nov. 27, 2024
Document Information [Line Items]
Entity Central Index Key	0001165320
Entity Registrant Name	GB SCIENCES INC
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2025
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	000-55462
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	59-3733133
Entity Address, Address Line One	9205 W. Russell Road, Suite 240
Entity Address, City or Town	Las Vegas
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89148
City Area Code	866
Local Phone Number	721-0297
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		407,071,028