v3.26.1
Cover Page - shares
6 Months Ended
Jun. 30, 2026
Aug. 03, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-39687  
Entity Registrant Name GPGI, Inc.  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 85-2749902  
Entity Address, Address Line One 309 Pierce Street  
Entity Address, City or Town Somerset  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 08873  
City Area Code 908  
Local Phone Number 518-0500  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   289,890,082
Entity Central Index Key 0001823144  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
New York Stock Exchange    
Document Information [Line Items]    
Title of 12(b) Security Class A Common Stock, $0.0001 par value per share  
Trading Symbol GPGI  
Security Exchange Name NYSE