| Abbreviation | Definition |
|---|---|
| GTRD | Global Triad, Inc. |
| GTSI | Government Technology Services, Inc. |
| GTSM | Galtech Semiconductor Materials |
| GTST | Global Telecom Solutions |
| GTSTD | Global Telecom Solutions |
| GTTIF | GrandTel Technology, Inc. |
| GTTLB | G T Global Telecom, Inc. Class B |
| GUCO | Grand Union Company |
| GUCOL | Grand Union Company |
| GUCOZ | Grand Union Company |
| GULF | Gulfwest Oil Company |
| GUMM | GumTech International, Inc. |
| GUMMW | GumTech International, Inc. Warrants |
| GUPB | G F S B Bancorp, Inc. |
| GURSY | Guinness, P. L. C. |
| GUSCE | Gulf USA Corporation (delisted) |
| GUSH | Canargo Energy Corporation |
| GUSHD | Canargo Energy Corporation |
| GUZBY | Grupo Herdez, S. A. de C. V. |
| GUZI | Moto Guzzi Corporation |