Allin was born Jesus Christ Allin at Weeks Memorial Hospital in Lancaster, New Hampshire, the younger of two sons born to Merle Colby Allin, Sr. (October 20, 1923 – June 23, 2001) and Arleta Gunther (August 17, 1936 – August 7, 2019) He was given this name because his father told his wife that Jesus Christ had visited him, and told him that his newborn son would be a great man in the vein of the Messiah. During early childhood, Allin's older brother Merle was unable to pronounce "Jesus" properly and called him "Jeje", which became "GG".