| Acronym | Definition |
|---|
| GBSA | Gulf Bond and Sukuk Association (Dubai, United Arab Emirates) |
| GBSA | Graduate Business Student Association |
| GBSA | Grapevine Baseball Softball Association (Grapevine, TX) |
| GBSA | Greenwich Bay Sailing Association (East Greenwich, RI) |
| GBSA | Greater Baltimore Swim Association (Maryland) |
| GBSA | Grandview Baseball Softball Association (Ohio) |
| GBSA | Gay, Bisexual, Straight Alliance |
| GBSA | Gulf Breeze Sports Association (Florida, USA) |
| GBSA | Graphics-Based Supervisory Architecture |
| GBSA | Great Britain Soccer Association |
| GBSA | Generalized Born/Solvent-Accessible Surface |
| GBSA | Ghana Biochemistry Students' Association (Kwame Nkrumah University of Science and Technology) |
| GBSA | General Business Security Agreement |