He was born in the United States and ordained as a priest there. His parents were János József Bartos and Mária Samak, and he had two siblings. He completed his military service in 1940.
No comprehensive biographical information about him has survived.
Bartos G. József: personal record. In: Historical directory of Hungarian, Hungarian-descended, and Hungarian-speaking clergy serving abroad. Available at: https://www.diaszporalelkipasztorok.hu/persons_v2/view.php?id=52 (accessed: 2026-04-05).