Gy
| Acronym | Definition |
|---|---|
| Gy | Gray (measure of dose of irradiation; amount of energy transferred to substance being irradiated) |
| Gy | Guernsey (postcode, United Kingdom) |
| Gy | Graveyard (card game) |
| Gy | Guyana |
| Gy | Goodyear |
| Gy | Gymnasium |
| Gy | Grimsby (UK) |
| Gy | Gyroscope |
| Gy | Grain Yield (agriculture) |
| Gy | Geneaology |
| Gy | Guyana Airways 2000 (IATA airline code) |
| Gy | Guidance Year |
| Gy | Vibrational Acceleration Along the Y-Axis |
| Gy | Marine Insurance Stamp (Scott Catalogue prefix; philately) |