| Acronym | Definition |
|---|
| GCTI➣Grupo Central de Transportes Internos (Portuguese: Central Inland Transport Group; Brazil) |
| GCTI➣Genesys Telecommunications Laboratories Inc (stock symbol) |
| GCTI➣Gestion Coordination de Travaux Immobiliers (French plumbing company) |
| GCTI➣Government Central Textile Institute (India) |
| GCTI➣Global Change Technology Initiative |