word | | Country name |
| form | 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 |
| form | Greenland | conventional long form: none conventional short form: Greenland local long form: none local short form: Kalaallit Nunaat |
| form | Grenada | conventional long form: none conventional short form: Grenada |
| form | Guam | conventional long form: Territory of Guam conventional short form: Guam local long form: Guahan local short form: Guahan |
| form | Guatemala | conventional long form: Republic of Guatemala conventional short form: Guatemala local long form: Republica de Guatemala local short form: Guatemala |
| form | Guernsey | conventional long form: Bailiwick of Guernsey conventional short form: Guernsey |
| form | Guinea | conventional long form: Republic of Guinea conventional short form: Guinea local long form: Republique de Guinee local short form: Guinee former: French Guinea |
| form | 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 |
| form | Guyana | conventional long form: Cooperative Republic of Guyana conventional short form: Guyana former: British Guiana |
| form | Haiti | conventional long form: Republic of Haiti conventional short form: Haiti local long form: Republique d'Haiti/Repiblik d' Ayiti local short form: Haiti/Ayiti |
| form | Heard Island and McDonald Islands | conventional long form: Territory of Heard Island and McDonald Islands conventional short form: Heard Island and McDonald Islands abbreviation: HIMI |