| Abbreviation | Definition |
|---|---|
| GYB | Glenvar Youth Boosters |
| GYB | Gower Youth Band |
| GYB | Grapevine Youth Baseball |
| GYB | Gurnee Youth Baseball |
| GYBA | Georgetown Youth Baseball Association |
| GYBA | Grayslake Youth Baseball Association |
| GYBA | Greenfield Youth Baseball Association |
| GYBE | Groups of Youth Boating in Education |
| GYBI | Global Youth Business Incubator |
| GYBS | Geneseo Youth Baseball Softball |
| GYC | Gaithersburg Youth Club |
| GYC | Generation of Youth for Christ |
| GYC | Global Youth Connect |
| GYC | Governed Youth Council |
| GYC | Greensboro Youth Council |
| GYCCI | Gauteng Youth Chamber of Commerce and Industry |
| GYD | General Youth Division |
| GYD | Global Youth Day |
| GYDA | Gulu Youth Development Association |
| GYE | Georgian Youth for Europe |