GCSU
| Acronym | Definition |
|---|---|
| GCSU | Georgia College & State University |
| GCSU | Grenfell Campus Student Union (Canada) |
| GCSU | Glendon College Student Union (Canada) |
| GCSU | Government Card Services Unit (Bank of America) |
| GCSU | Goldsmiths College Students' Union (UK) |
| GCSU | Gas Control Safety Unit (marine engines) |