| Abbreviation | Definition |
|---|---|
| GSLA | Gay Straight Law Alliance |
| GSLA | Global Schools Leadership Alliance |
| GSLA | Global STEM Leadership Alliance |
| GSSA | Gender Sex and Sexuality Alliance |
| GSSA | Global Surgery Student Alliance |
| GSTA | Gay Straight Trans Alliance |
| GTCA | Global Trade Credit Alliance |
| GTHA | Gloucester Township Hockey Alliance |
| GUYA | Georgia Undocumented Youth Alliance |
| GVCA | Grand Valley Citizens Alliance |
| GWA | Gender and Water Alliance |
| GWA | Getronics Workspace Alliance |
| GWA | Global Workspace Alliance |
| GWA | Green World Alliance |
| GXM | GovernmentalXenobiologyManagement |
| GZA | Green Zionist Alliance |
| HAA | Home Acoustics Alliance |
| HAA | Houston Arts Alliance |
| HAAA | Henderson Area Arts Alliance |
| HAAAA | Harvard Asian American Alumni Alliance |