GMK
| Acronym | Definition |
|---|---|
| GMK | Gnu Make File |
| GMK | Grand Master Key (locksmithing) |
| GMK | Godzilla, Mothra, and King Ghidorah (monsters; movie) |
| GMK | Grindsted Motor Klub (Danish auto club) |
| GMK | Good Morning Kuya (TV show; Philippines) |
| GMK | Gamelan Mitra Kusuma (Indonesian music and dance ensemble) |
| GMK | Global Medical Knowledge, Inc. (information and collaboration group) |