| Acronym | Definition |
|---|
| GSSD➣Good Spirit School Division (Saskatchewan, Canada) |
| GSSD➣Gerstmann-Straussler-Scheinker Disease (prion disease) |
| GSSD➣Greensburg Salem School District (Pennsylvania) |
| GSSD➣General Support Systems Division |
| GSSD➣Ground Systems Support Directorate |
| GSSD➣Georgia Soccer Support Division |
| GSSD➣Global Strike Support Document |