| Abbreviation | Definition |
|---|---|
| GEAA | Greater Edwards Aquifer Alliance |
| GEAI | Good Energies Alliance Ireland |
| GEMA | Global Enterprise Mobility Alliance |
| GGCA | Global Gender and Climate Alliance |
| GGCA | Global Gender Climate Alliance |
| GGTA | Green Growers Technology Alliance |
| GHA | German Health Alliance |
| GHA | Greenville Homeless Alliance |
| GHIA | Greater Homewood Interfaith Alliance |
| GIA | Global Industry Alliance |
| GICA | Global Infrastructure Connectivity Alliance |
| GIGA | Global Invertebrate Genomics Alliance |
| GISA | Gender Identity and Sexuality Alliance |
| GLA | Gay Lesbian Alliance |
| GLAA | Gay and Lesbian Activists Alliance |
| GLAA | Global Liberal Arts Alliance |
| GLAA | Greater Lewisville Arts Alliance |
| GLAAD | Gay and Lesbian Alliance for Anti Defamation |
| GLAAD | Gay Lesbian Alliance Against Defamation |
| GLAAD | Gays and Lesbians Alliance Against Defamation |