| Acronym | Definition |
|---|
| GSU | Georgia State University |
| GSU | Georgia Southern University |
| GSU | Governors State University |
| GSU | Grambling State University |
| GSU | Google Sketch up |
| GSU | Genealogical Society of Utah |
| GSU | Graduate Student Union |
| GSU | General Service Unit |
| GSU | Galatasaray University |
| GSU | Geographically Separated Unit |
| GSU | George Sherman Union (Boston University) |
| GSU | Garrison Support Unit |
| GSU | Geographically-Separated Unit |
| GSU | Grain Services Union (Canada) |
| GSU | Gauche Socialiste Unifiée (French: Unified Socialist Left, Morocco) |
| GSU | Google Stock Unit |
| GSU | Gulf States Utilities Company (Beaumont, TX) |
| GSU | General Support Unit |
| GSU | Global Support Unit (UNDP) |
| GSU | Gray-Scale Ultrasonography (jaundice test) |
| GSU | Geneseo State University |
| GSU | Greater Sudbury Utilities, Inc (Sudbury, ON, Canada) |
| GSU | Generator Stepup |
| GSU | Gear Shift Unit |
| GSU | Gombe State University (Nigeria) |
| GSU | Gimbal Structure/Shock |