| Acronym | Definition |
|---|
| GTIS➣Global Trade Information Services |
| GTIS➣Government Telecommunications and Informatics Services (Canada) |
| GTIS➣Gene Technology Information Service (Australia) |
| GTIS➣Gifted and Talented Independent Study (Texas Education Agency) |
| GTIS➣GOES Tap Imaging System |
| GTIS➣Government Technical Information Services (Canada) |