| Pais | Country | Prefijo |
| Gambia | Gambia | 220 |
| Geogia | Georgia | 995 |
| Ghana | Ghana | 233 |
| Gibraltar | Gibraltar | 350 |
| Grecia | Greece | 30 |
| Groelandia | Greenland | 299 |
| Guadalupe | Guadeloupe | 590 |
| Guam | Guam | 1671 |
| Guatemala | Guatemala | 502 |
| Ghinea | Ghinea | 224 |
| Ghinea Bissau | Ghinea Bissau | 245 |
| Ghinea Ecuatorial | Equatorial Ghinea | 240 |
| Guyana | Guyana | 592 |
| Guyana Francesa | French Guiana | 594 |