Gibraltar
18 years of age; universal; and British citizens who have
been residents six months or more
Greece
18 years of age; universal and compulsory
Greenland
18 years of age; universal
Grenada
18 years of age; universal
Guam
18 years of age; universal; US citizens but do not vote in US
presidential elections
Guatemala
18 years of age; universal; note - active duty members of
the armed forces may not vote and are restricted to their barracks
on election day
Guernsey
16 years of age; universal
Guinea
18 years of age; universal
Guinea-Bissau
18 years of age; universal
Guyana
18 years of age; universal