GTSB
| Acronym | Definition |
|---|---|
| GTSB | GM (Genetically Modified) Glyphosate-Tolerant Soya Bean |
| GTSB | Greater Toronto Services Board (est. 1998; Toronto, Ontario, Canada) |
| GTSB | Governor's Traffic Safety Bureau (Iowa) |
| GTSB | Generalized Tangential Sphere Bound |
| GTSB | Gigaspeed Technology Sdn. Bhd. (Selangor, Malaysia) |
| GTSB | Glucose Teepol Salt Broth |