| Abbreviation | Definition |
|---|---|
| FYSI | Foster Youth Success Initiative |
| FYSI | Friends of Youth Society International |
| FYSN | Foster Youth Support Network |
| FYT | Finchley Youth Theatre |
| FYT | Flint Youth Theatre |
| FYT | Frontier Youth Trust |
| FYTP | Families and Youth in Transition Program |
| FYTP | Farm Youth Training Programme |
| FYYFF | Foreign Youth Yearn For Freedom |
| GABY | Grants Advisory Board for Youth |
| GARY | Gang Amateur Radio Youth |
| GAY | Gods Angry Youth |
| GAY | God's Angry Youth |
| GAY | Great American Youth |
| GAYA | Governance and Youth in the Alps |
| GAYC | Glen Allen Youth Center |
| GBYM | Gandhi Brigade Youth Media |
| GCDY | Gloomshroud Camp for Delinquent Youth |
| GCYFL | Gold Coast Youth Football League (California) |
| GDYO | Greater Dallas Youth Orchestra |