GJ or Gj may refer to:
Gjirokastër (Albanian pronunciation: [ɟiɾokastəɾ], definite Albanian form: Gjirokastra), is a city in southern Albania, situated in a valley between the Gjerë mountains and the Drino, at 300 metres above sea level.
Gjakova (Albanian: Gjakovë) or Đakovica (Serbian Cyrillic: Ђаковица) is a city and municipality located in the Gjakova District of western Kosovo.
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.
Gjilan (Albanian: Gjilani) or Gnjilane (Serbian: Гњилане) is a city and municipality located in the Gjilan District in eastern Kosovo.
Gjorge Ivanov, also transliterated as Ǵorge (Macedonian: Ѓорге Иванов, pronounced [ˈɟɔrɡɛ ˈivanɔf]; born May 2, 1960), is the President of the Republic of Macedonia, in office since 2009.
Gjon Kastrioti or John Castriot (13?? – 4 May 1437) was an Albanian nobleman, member of the Kastrioti family, and the father of Skanderbeg.
Gap junction beta-1 protein (GJB1), also known as connexin 32 (Cx32) is a transmembrane protein that in humans is encoded by the GJB1 gene.