Gabriel was a composer in the Euphorian Empire who was conscripted and ordered to kill in the War against the Scardatura. Instead, he killed his commanding officer.
Gabriel's brother Jude stole him away, escaping through the Gateway to Earth — specifically, Es Vedra, 1855 — where they encountered Francisco Palau, who mistook them for angels, and gave them a copy of the Bible.
In 1997, Jude and Gabriel were the owners of The Rapture, a nightclub in Ibiza. With no memories of his past life, Gabriel was the DJ, and through his music he hypnotised the people in his nightclub with the help of PCP, which he called "angel dust".
Jude led him to believe that he was the "Angel of Music", and that he was saving the souls of the youths. Whilst talking to Gustavo in his DJ box, they both fell to their deaths. (AUDIO: The Rapture)