GJ or Gj may refer to:
Gjirokastër (Albanian pronunciation: [ɟiɾokastəɾ]) is a city in southern Albania, on a valley between the Gjerë mountains and the Drino, at 300 metres above sea level.
Gjilan (Albanian: Gjilani, IPA: [ɟilani] ( listen))) or Gnjilane (Serbian Cyrillic: Гњилане), is a city and municipality located in the Gjilan District in eastern Kosovo.
Gjakova (Albanian: Gjakovë) or Đakovica (Serbian Cyrillic: Ђаковица) is a city and municipality located in the Gjakova District of western Kosovo.
Gjorge Ivanov (Macedonian: Ѓорге Иванов, pronounced [ˈɟɔrɡɛ ˈivanɔf]; born May 2, 1960), is a Macedonian politician currently serving as the President of the Republic of Macedonia, in office since 2009.
Gjergji Muzaka (born 26 September 1984 in Tiranë) is an Albanian professional footballer who plays as a midfielder for Skënderbeu Korçë in the Albanian Superliga.
Gjon Kastrioti, or John Castriot (13?? – 4 May 1437), was an Albanian nobleman, member of the Kastrioti family, and the father of Skanderbeg.
Gjøvik is a town and a municipality in Oppland county, Norway. The administrative centre of the municipality is the town of Gjøvik.