word | | Country name |
| Greece | Greece | conventional long form: Hellenic Republic conventional short form: Greece local long form: Elliniki Dhimokratia local short form: Ellas or Ellada former: Kingdom of Greece |
| Greenland | Greenland | conventional long form: none conventional short form: Greenland local long form: none local short form: Kalaallit Nunaat |
| Grenada | Grenada | conventional long form: none conventional short form: Grenada |
| Grenadines | Saint Vincent and the Grenadines | conventional long form: none conventional short form: Saint Vincent and the Grenadines |
| group | Tuvalu | ... form: none conventional short form: Tuvalu local long form: none local short form: Tuvalu former: Ellice Islands note: "Tuvalu" means "group of eight," referring to the country's eight traditionally inhabited islands |
| Guahan | Guam | conventional long form: Territory of Guam conventional short form: Guam local long form: Guahan local short form: Guahan |
| Guam | Guam | conventional long form: Territory of Guam conventional short form: Guam local long form: Guahan local short form: Guahan |
| Guatemala | Guatemala | conventional long form: Republic of Guatemala conventional short form: Guatemala local long form: Republica de Guatemala local short form: Guatemala |
| Guernsey | Guernsey | conventional long form: Bailiwick of Guernsey conventional short form: Guernsey |
| Guiana | Guyana | conventional long form: Cooperative Republic of Guyana conventional short form: Guyana former: British Guiana |
| Guiana | Suriname | conventional long form: Republic of Suriname conventional short form: Suriname local long form: Republiek Suriname local short form: Suriname former: Netherlands Guiana, Dutch Guiana |
| Guine | Guinea-Bissau | conventional long form: Republic of Guinea-Bissau conventional short form: Guinea-Bissau local long form: Republica da Guine-Bissau local short form: Guine-Bissau former: Portuguese Guinea |