Father Amorth was born in Modena, Emilia. He was ordained a Roman Catholic priest in 1954 and became an official exorcist in June 1986. Fr. Gabriele was a member of the Society of St. Paul, the congregation founded by James Alberione in 1914. In 1990, Fr. Amorth founded the International Association of Exorcists and was president until he retired, in 2000. In 2013 Fr. Amorth said he had performed 160,000 exorcisms in the course of his ministry.
The two books he wrote are "An Exorcist Tells His Story" and "An Exorcist: More Stories" of his personal accounts as an Exorcist.