Germany
18 January 1871 (German Empire unification); divided into
four zones of occupation (UK, US, USSR, and later, France) in 1945
following World War II; Federal Republic of Germany (FRG or West
Germany) proclaimed 23 May 1949 and included the former UK, US, and
French zones; German Democratic Republic (GDR or East Germany)
proclaimed 7 October 1949 and included the former USSR zone;
unification of West Germany and East Germany took place 3 October
1990; all four powers formally relinquished rights 15 March 1991

Ghana
6 March 1957 (from UK)

Gibraltar
none (overseas territory of the UK)

Greece
1829 (from the Ottoman Empire)

Greenland
none (part of the Kingdom of Denmark; self-governing
overseas administrative division of Denmark since 1979)
note: foreign affairs is the responsibility of Denmark, but
Greenland actively participates in international agreements relating
to Greenland

Grenada
7 February 1974 (from UK)

Guadeloupe
none (overseas department of France)

Guam
none (territory of the US)

Guatemala
15 September 1821 (from Spain)

Guernsey
none (British crown dependency)