| Abbreviation | Definition |
|---|---|
| GOJHL | Greater Ontario Junior Hockey League |
| GOOD | Giving Out Our Dreams |
| GOYA | Greek Orthodox Youth Association |
| GOYA | Greek Orthodox Youth Of America |
| GOYS | General Organisation for Youth and Sport |
| GPY | Global Partners for Youth |
| GPY | Global Program on Youth |
| GPYW | General Presidency for Youth Welfare |
| GPYW | General Presidency of Youth Welfare |
| GRAVITY | GED Reengagement Alternative Vocational Individualized Training for Youth |
| GSOY | Gender Sexuality and Online Youth |
| GSY | Global Startup Youth |
| GTY | Glendale Temple Youth |
| GUYA | Georgia Undocumented Youth Alliance |
| GYA | Glendale Youth Alliance |
| GYA | Global Youth Action |
| GYAN | Global Youth Action Network |
| GYAT | Global Youth Advocacy Training |
| GYB | Georgia Youth Ballet |
| GYB | Girls Youth Basketball |