Found 5 full forms for GTHA
| Term | Full Form | Category |
|---|---|---|
| GTHA | Gap Tallard Hautes Alpes 
| Others |
| GTHA | Gloucester Township Hockey Alliance
| Others |
| GTHA | Grand Traverse Hockey Association
| Others |
| GTHA | Greater Toronto and Hamilton Area
| Others |
| GTHA | Greater Toronto Hamilton Area
| Others |