Gibraltar
conventional long form: none
conventional short form: Gibraltar

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
conventional long form: none
conventional short form: Greenland
local long form: none
local short form: Kalaallit Nunaat

Grenada
conventional long form: none
conventional short form: Grenada

Guam
conventional long form: Territory of Guam
conventional short form: Guam
local long form: Guahan
local short form: Guahan

Guatemala
conventional long form: Republic of Guatemala
conventional short form: Guatemala
local long form: Republica de Guatemala
local short form: Guatemala

Guernsey
conventional long form: Bailiwick of Guernsey
conventional short form: Guernsey

Guinea
conventional long form: Republic of Guinea
conventional short form: Guinea
local long form: Republique de Guinee
local short form: Guinee
former: French Guinea

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

Guyana
conventional long form: Cooperative Republic of Guyana
conventional short form: Guyana
former: British Guiana