| Geological Society of South Africa | Academic & Science |
| Graduate Student Sociology Association | Academic & Science |
| Graduate School Student Association | Academic & Science |
| Genealogical Society of South Africa | Academic & Science |
| Graduate Student Studies Association | Academic & Science |
| General Sales and Service Agent | Business |
| Global Singers and Songwriters Association | Business |
| Georgia School Superintendents Association | Community |
| Graduate Studies Student Association | Community |
| Garden State Sikh Association | Community |
| Garden State Seafood Association | Community |
| Girl Scouts of Southern Alabama | Community |
| Granite State Swim Association | Community |
| Georgia State Service Assembly | Computing |
| Generic Security Service Algorithm | Computing |
| Global Security and Stability Agency | General |
| Gujarati Samaj of San Antonio | General |
| Global Standard Stratigraphic Age | General |
| Global Space Situational Awareness | General |
| Ground Support Systems Activation | Governmental |
| General Supply Support Area | Governmental |
| Guided Missleman Seaman Apprentice | Governmental |
| Gender Sex and Sexuality Alliance | Governmental |
| Global Surgery Student Alliance | Governmental |
| Guernsey Social Security Authority | Governmental |
| Golden State Spirit Association | Sports |
| Grapevine-Southlake Soccer Association | Sports |
| Greater Sycamore Soccer Association | Sports |
| Greater Sacramento Softball Association | Sports |
| Great Southern Sports Association | Sports |
