v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 08, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-42836  
Entity Registrant Name Gemini Space Station, Inc.  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 33-3263417  
Entity Address, Address Line One 600 Third Avenue  
Entity Address, Address Line Two 2nd Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10016  
City Area Code 646  
Local Phone Number 751-4401  
Title of 12(b) Security Class A common stock, par value of $0.001 per share  
Trading Symbol GEMI  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Central Index Key 0002055592  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   44,163,149
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   75,126,784