He is of Italian and Puerto Rican descent. His father, Gregorio, Sr. was born in Calabria, Italy, and his mother, Margarita, was born in Aguadilla, Puerto Rico.
He named his son Dante Aleksander, after the famous author, Dante Aligieri.
Is Producer/Writer/Director of the film production company GruntWorks Entertainment Inc.
He and his former girlfriend Diana Christabel met when they played opposite each other in a short film directed by Anthony Bellisario. Gregori later cast her in two of his films, Manhattanites and MARy.
Owns a mixed black Chow Chow/German Shepherd named "Mills" after Brad Pitt's character in David Fincher's Se7en.
Had a second child, a daughter named Isabella Rain, on May 29, 2008, with actress Diana Christabel.