George Gordon was provided to the bishopric of Galloway on the resignation of his brother John on 8 July 1586. There is no evidence that he ever received consecration before his death, which occurred sometime between 1 April and 5 November 1588. After his death, hostility in Scotland to episcopacy meant that no new bishops were made until 1605.
^ abFasti Ecclesiae Scoticanae; vol. 7; by Hew Scott
Donaldson, Gordon, "The Bishops and Priors of Whithorn", in Dumfriesshire and Galloway Natural History & Antiquarians Society: Transactions and Journal of Proceedings, Third Series, vol. 27 (1950), pp. 127–54
Dowden, John, The Bishops of Scotland, ed. J. Maitland Thomson, (Glasgow, 1912)
Watt, D. E. R., Fasti Ecclesiae Scoticanae Medii Aevi ad annum 1638, 2nd Draft, (St Andrews, 1969)