| 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) |