| Acronym | Definition |
|---|
| GMST➣Greenwich Mean Sidereal Time |
| GMST➣Global Mean Surface Temperature (ecology) |
| GMST➣Global Maplestory Tespia (gaming) |
| GMST➣Game Setting |
| GMST➣General Military Subjects Test |
| GMST➣Genov Modified Stroop Test |
| GMST➣Geometric Mean Survival Time (transplantation medicine) |