In 1931, he was appointed by [[Metropolitan]] [[Anthony (Khrapovitsky) of Kiev|Anthony (Khrapovitsky)]] as the chancellor of the Synod of Bishops of the Russian Orthodox Church Outside Russia. As well as having participated in many Russian theological reviews, in 1932, Fr. George was appointed editor of the Synod's magazine, "Church Life". When the ROCOR Synod of Bishops moved from Europe to the United States of America in 1951, Fr. George emigrated also.
After the death of his wife, Fr. George took monastic vows and was given the name Gregory. He then was [[consecration of a bishop|consecrated]] to the episcopacy in 1978 as the [[vicar]] Bishop of Manhattan, followed, in 1981, with his appointment as Bishop of Washington and Florida. In 1985, Bishop Gregory was retired from the Synod of Bishops, in part because of his relationship with [[
Holy Transfiguration Monastery|Holy Transfiguration Monastery (Brookline, Massachusetts)]], and the scandal that led to their departure. Investigations showed that Bishop Gregory had squelched earlier accusations against HTM. Bishop Gregory was also left embittered by what he believed was the unfair treatment of his son, Archimandrite Anthony, who had been the head of the Russian Ecclesiastical Mission, and had been accused of selling property for his personal benefit.
Bp. Gregory reposed [[October 7]], 1995 after having made known his desire that no bishop of ROCOR attend his funeral.