| Abbreviation | Definition |
|---|---|
| GNTA | Georgia National Tourism Administration |
| GNTA | Georgian National Tourism Administration |
| GNTB | German National Tourist Board |
| GOA | Guiding Organisations Australia |
| GONE | Getting Out Never Expected |
| GPHA | Greater Philadelphia Hotel Association |
| GPTL | Global Poker Tours Limited |
| GPTL | Global Poker Tours LTD |
| GPTT | Grand Prix Travel Team |
| GSH | Great Southern Hotel |
| GSTA | German Speaking Travel Alliance |
| GSTA | Global Sustainable Tourism Alliance |
| GSTC | Global Sustainable Tourism Council |
| GSTC | Global Sustainable Tourism Criteria |
| GSTF | Graduate Student Travel Fund |
| GSTROAD | Grand Southern Trunk Road |
| GSTS | Graduate Student Travel Support |
| GT | Gokus Travels |
| GTA | Gullivers Travel Associates |
| GTAD | Golden Triangle Arts District |