Reyna was born in Chicago, Illinois.
In 1969, Reyna began his career as assistant animator (inbetweener) for Amby Paliwoda and Frank Andrina (animated the 'Archy Declares War' sequence) on Fine Arts Films production of Shinbone Alley.
During the 1970s he worked as layout artist for DePatie-Freleng, Ron Campbell, and Hanna-Barbera, where he worked on a number of TV shows including Captain Caveman and the Teen Angels, Scooby's All-Star Laff-A-Lympics, and The Smurfs. There was "Metric Man" for Orsatti Productions, and most memorably, Peter Aries' notorious Kling Street studio.
In the 1980s, after a brief stopover in La Paz, Mexico, evaluating animation trainees for Kinney-Valas, Greg worked as animator on various projects. Pino van Lamsveerde was his director at Atkinson Film-Arts in Ottawa, Canada, creating the "Harry Canyon" segment of the film Heavy Metal. At Filmation Greg worked on She-Ra and The Real Ghostbusters. At DIC there was Super Mario Brothers, and at Klasky-Csupo Greg was layout artist and animator on the first season of The Simpsons.
During the 1990s Reyna worked as layout supervisor and director for Warner Bros. on Tiny Toons, Animaniacs, Pinky and the Brain, and as timing director on Baby Blues, and Histeria!.
Since the turn of the century, Reyna has worked as slugger and timing director for "Sony-Adelaide": Dilbert, "Sammy"; Warner Bros.: Zeta; Sunbow Productions: Generation O, The Cramp Twins; Nickelodeon Studios: "Oh Yeah!", "The Pied Piper", BKN: "Roswell", "Capertown Cops"; "Tom T. Animation": Baldo, Biker Mice From Mars; and SD Entertainment: Alien Racers, Care Bears, Angelina Ballerina.
Writing Credits[]
- Operation: Lollipop (co-written with Peter Hastings and Sherri Stoner)
Directing credits[]
- Ep4: Goodfeathers: The Beginning (Goodfeathers)
- Ep9: Where Rodents Dare (co-directed with Dave Marshall)
- Ep12: West Side Pigeons (co-directed with Barry Caldwell and Dave Marshall)
- Ep14: Cat on a Hot Steel Beam (co-directed with Barry Caldwell)
- Ep18: Nothing But the Tooth
- Ep19: Meatballs or Consequences
- Ep23: Ta Da Dump, Ta Da Dump, Ta Da Dump Dump Dump
- Ep28: Mesozoic Mindy
- Ep28: The Good, the Boo, and the Ugly
- Ep31: Puttin' on the Blitz
- Ep33: Noah's Lark
- Ep33: Hiccup (co-directed with Dave Marshall)
- Ep34: Clown and Out
- Ep35: In the Garden of Mindy
- Ep35: No Place Like Homeless
- Ep35: Katie Ka-Boo
- Ep37: Dough Dough Boys
- Ep41: Broadcast Nuisance (co-directed with Kirk Tingblad)
- Ep42: Hollywoodchuck
- Ep44: The Senses Song
- Ep47: When Mice Ruled the Earth
- Ep48: Mobster Mash (co-directed with Dave Marshall)
- Ep50: Jingle Boo
- Ep53: Girlfeathers
- Ep56: Schnitzelbank
- Ep57: Up a Tree
- Ep58: Meet John Brain (co-directed with Kirk Tingblad)
- Ep63: With Three, You Get Eggroll (co-directed with Dave Marshall)
- Ep63: Katie Ka-Boom: Call Waiting (co-directed with Dave Marshall)
- Ep68: Whistle-Stop Mindy (co-directed with Dave Marshall)
- Ep94: The Brain's Apprentice (co-directed with Barry Caldwell and Ron Fleischer)