GCTT
| Acronym | Definition |
|---|---|
| GCTT | Graduate Certificate in Tertiary Teaching (various universities) |
| GCTT | Ground Combat Tactical Trainer (US Army) |
| GCTT | Groupe Chabaane Taleb Trading (French: Chabaane Taleb Trading Group; Tunisia) |
| GCTT | Germ Cell Testicular Tumor (oncology) |