His father came from the wealthy noble Muzaka family whilst his mother came from the noble Zenevisi family and was a daughter of Albanian lord John Zenevisi.

After the death of his father Andrea III, Gjin was the official heir to his father's throne and became the Lord of Tomorrica and Deabolis, bordering the domains of the noble Arianiti family.

During the League of Lezhë he joined the forces of Skanderbeg against the Ottoman Empire.

[4] This did not last long, as the Ottomans had expelled Gjon from his land and was forced to flee and take refuge in Italy.

Due to agriculture and farming, the ruins of the church were fully destroyed.