| Acronym | Definition |
|---|
| GCTP➣General Cartographic Transformation Package (software; USGS) |
| GCTP➣Génie Civil et Travaux Publics (French: Civil Engineering and Public Works) |
| GCTP➣Goulley Coimbra Travaux Publics (French public works company) |
| GCTP➣Gold Coast Tourist Parks (Queensland, Australia) |
| GCTP➣General Coordinate Transformation Package (software) |
| GCTP➣Group Calendaring Transport Protocol (open source project) |
| GCTP➣Grant County Tea Party (Indiana) |
| GCTP➣Generic Construction Test Procedure |