| Acronym | Definition |
|---|
| GTLC | Grand Teton Lodge Company (Moran, WY) |
| GTLC | Gateway Trinity Lutheran Church (Florida) |
| GTLC | Global Transportation Logistics Company |
| GTLC | Ghana Trade and Livelihood Coalition (advocacy) |
| GTLC | Gippsland Trades & Labour Council (Australia) |
| GTLC | Golden Triangle Learning Center (Denver, CO) |
| GTLC | Grand Trail des Lacs et des Châteaux (French: Great Lakes Trail and Castles; Belgium) |
| GTLC | Grizzly Testing & Learning Center (Adams State College; Colorado) |
| GTLC | Guide to Texas Legislative Council Services |
| GTLC | Guelph Trades and Labour Council (Canada) |
| GTLC | Grace Trinity Lutheran Church (Bear Creek, WI) |