George Gianniris was born in 1960 and gained his collegiate education at the Faculty of Pastoral and Social Theology of the University of Thessalonica from which he graduated. He entered the [[clergy]] through the Patriarchate of Alexandria and was [[ordination|ordained a [[deacon]] on [[October 1]], 1988. He was ordained a [[priest]] on the following day, [[October 2]]. Following his ordination Fr. George served as the Superior at the Patriarchal Church of the Holy Unmercenaries in the [[Archdiocese of Johannesburg and Pretoria]] as well as secretary of the [[Archdiocese]]. He was appointed Director of the Private Patriarchal Office in April 1997.
On [[September 23]], 1997, Fr. George was elected [[Bishop]] of the newly formed see of Nigeria. His [[consecration of a bishop|consecration]] took place on [[November 24]], 1997. He was elevated to the rank of Metropolitan on [[October 27]], 2004.