GCY
| Acronym | Definition |
|---|---|
| GCY | Global Citizen Year |
| GCY | Growth Control, Y-Chromosome Influenced |
| GCY | Greensboro Community YMCA (Young Men's Christian Association; est. 1889; Greensboro, NC) |
| GCY | Golf Club Ybrig (Switzerland) |
| GCY | German-Canadian Yearbook (publication; Historical Society of Mecklenburg Upper Canada) |
| GCY | Grupo Cultural Yuyachkani (Spanish: Yuyachkani Cultural Group; Peru) |
| GCY | Gold Coast Yachts, Inc. (US Virgin Islands) |