v3.26.1
Cover - shares
 12 Months Ended
Jul. 09, 2027
Jul. 13, 2026
Document Information [Line Items]    
Document Type 20-F  
Amendment Flag false  
Document Registration Statement false  
Document Annual Report false  
Document Transition Report false  
Document Shell Company Report true  
Document Shell Company Event Date Jul. 10, 2026  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-42822  
Entity Registrant Name General Fusion Group Ltd.  
Entity Central Index Key 0002074850  
Entity Incorporation, State or Country Code A1  
Entity Address, Address Line One 6020 Russ Baker Way  
Entity Address, City or Town Richmond  
Entity Address, State or Province BC  
Entity Address, Country CA  
Entity Address, Postal Zip Code V7B 1B4  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Document Accounting Standard U.S. GAAP  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   52,988,419
Document Financial Statement Error Correction [Flag] false  
Auditor Name PricewaterhouseCoopers LLP  
Auditor Location Vancouver, British Columbia  
Auditor Firm ID 271  
WithumSmith Brown PC    
Document Information [Line Items]    
Auditor Name WithumSmith+Brown, PC  
Auditor Location New York, New York  
Auditor Firm ID 100  
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Shares, no par value  
Trading Symbol GFUZ  
Security Exchange Name NASDAQ  
Warrants    
Document Information [Line Items]    
Title of 12(b) Security Warrants  
Trading Symbol GFUZW  
Security Exchange Name NASDAQ  
Business Contact [Member]    
Document Information [Line Items]    
Entity Address, Address Line One 6020 Russ Baker Way  
Entity Address, City or Town Richmond  
Entity Address, State or Province BC  
Entity Address, Country CA  
Entity Address, Postal Zip Code V7B 1B4  
City Area Code 604  
Local Phone Number 439-3003  
Contact Personnel Name Greg Twinney