| Acronym | Definition |
|---|
| GTMC➣Guild of Travel Management Companies (London, England, UK) |
| GTMC➣Glenwood Telephone Membership Corporation (Nebraska) |
| GTMC➣Gypsy Tour Motorcycle Classic |
| GTMC➣Government Technology Managers Conference |
| GTMC➣George Tyler Moore Center (Shepherd University) |
| GTMC➣Gingival Tissue Mononuclear Cells (periodontitis) |