GTMC
| 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) |