| Rank | Abbreviation | Meaning |
|---|
| ***** | GSAC | Groupement pour la Sécurité de l'Aviation Civile
| |
| **** | GSAC | Generalized Symmetry Adapted Cluster (theory)
| |
| **** | GSAC | Governance Structural Adjustment Credit
| |
| **** | GSAC | Graduate Student Association of Canada
| |
| *** | GSAC | gamma-glutamyl-S-allylcysteine
| |
| *** | GSAC | Graduate Student Advisory Council
| |
| *** | GSAC | Graduate Study Advisory Committee
| |
| *** | GSAC | Groupement pour la Securite Aviation Civile
| |
| *** | GSAC | Geological Society of America
| |
| *** | GSAC | Girl Scouts Audubon Council
| |
| *** | GSAC | Get Smart About Credit
| |
| *** | GSAC | Gas Safety Advisory Committee
| |
| *** | GSAC | Graduate Student Association Council
| |
| *** | GSAC | Geraldton Sporting Aboriginal Corporation
| |
| ** | GSAC | Girl Scouts of the Adirondack Council
| |
| ** | GSAC | Garden State Akita Club
| |
| ** | GSAC | Get Smart about Credit Day
| |
| ** | GSAC | Girl Scouts of the Appalachian Council
| |
| * | GSAC | Graduate Student Advisory Committee
| |
| * | GSAC | Garden State Advisory Council
| |
| * | GSAC | Graduate Studies and Admissions Committee
| |
| * | GSAC | Governmental Strategy Against Corruption
| |
| * | GSAC | Global Security Architecture Committee
| |
| * | GSAC | Graduate Studies Advisory Committee
| |
| * | GSAC | General Support Aviation Company
| |