| Acronym | Definition |
|---|
| GASA | Genetic Algorithms and Simulated Annealing |
| GASA | Gestion et Animation des Structures Aquatiques (French: Aquatic Structures Management and Animation) |
| GASA | Greeks Against Sexual Assault |
| GASA | Georgia Amateur Soccer Association |
| GASA | Guernsey Amateur Swimming Association |
| GASA | Geostatistical Association Of Southern Africa |
| GASA | Global Aviation Services of America, Inc. |
| GASA | Grays Athletic Supporters Association (UK) |
| GASA | Growth Adjusted Sonographic Age |
| GASA | Ground Aided Seeker Assist |
| GASA | Groupement d'Action Sanitaire de l'Ain (French: Health Action Group of Ain) |
| GASA | Graduate Astronomy Students Association (University of Toronto; Canada) |