| Acronym | Definition |
|---|
| GTBA➣Good to Be Alive |
| GTBA➣Gas Turbine Builders Association (est. 1995; UK) |
| GTBA➣Golden Triangle Baptist Association (Beaumont, TX) |
| GTBA➣Graph Theory of Brian Alspach (mathematics; Canada) |
| GTBA➣Gasoline-grade Tertiary Butyl Alcohol |
| GTBA➣Glasgow Thai Boxing Academy (est. 2002; UK) |