He was the third son of Alexander I of Georgia by his second wife Tamar. Though Demetre, Alexander’s second son, seems to have been a rightful successor to his elder brother Vakhtang IV, George actually held power after Vakhtang’s death in December 1446. The process of the disintegration of the Georgian kingdom had already begun and was close to reach its climax. The most troublesome were revolts by the western Georgian nobles and the atabegs of Samtskhe. The latter even attempted to create a separate church for his princedom, but the efforts of the Georgian Catholicos Patriarch David IV prevented the Georgian Orthodox Church from being split into two.