Pak is a graduate of Yale University and studied history at Oxford as a Rhodes Scholar and film at NYU.

His early work is noted for its strong Asian American themes. His New York University (NYU) student film, Fighting Grandpa, about his Korean grandparents, won the Gold Medal at the 25th Student Academy Awards. His short film "Asian Pride Porn", starring playwright David Henry Hwang and director Michael Kang, was licensed to Atom Films. Pak's feature film Robot Stories won 35 film festival awards. He collected his critically acclaimed screenplays in the recent book Robot Stories & More Screenplays, whose foreword was written by David Henry Hwang, and which has been used in college classes in writing, film, and Asian American studies.

Pak is a frequent writer for Marvel Comics, starting in September 2004 and signing an exclusive deal with them in July 2005. He has worked on such titles as Warlock, Endsong, Warsong, Iron Man, and The Incredible Hulk, and Dynamite Entertainment's spin-off series based on the Sci-Fi Channel's Battlestar Galactica.

Recent projects include Incredible Hercules, Warbound and Son of Hulk, all spinning-off from World War Hulk, as well as Testament and War Machine. Greg is also one of the featured contributors to The Asian American Superhero Anthology.

Filmography

• Robot Stories (2003)

Bibliography

Comics work includes:

• Warlock (5th series) (with Charlie Adlard, 4-issue mini-series, Marvel Comics, 2004)
• Phoenix - Endsong (with Greg Land, 5-issue limited series, Marvel Comics, 2005)
• The Imperfects (with Renato Arlem, 6-issue limited series, Marvel Comics, 2005)
• Iron Man: House of M #1-3 (Marvel Comics, 2005)
• New World #1-5 (Marvel Comics, 2005)
• Amazing Fantasy (2nd series) #15 (1st story in anthology) (Marvel Comics, 2006)
• What if: Submariner (Marvel Comics, 2006)
• Incredible Hulk (3rd series) #92-111 (Marvel Comics, 2006—2007)
• Battlestar Galactica (Dynamite Entertainment, 2006—2007)
• Phoenix - Warsong (with Tyler Kirkham, 5-issue limited series, Marvel Comics, 2006—2007)
• World War Hulk #1-5 (with John Romita, Jr., Marvel Comics, 2007—2008)
• Incredible Hercules (with co-author Fred Van Lente) #112-141 (Marvel Comics, 2008—2010)
• Warbound (5-issue limited series, Marvel Comics, 2008)
• Son of Hulk (with Ron Garney, Marvel Comics, 2008-ongoing)
• Testament (with Carmine Di Giandomenico, 5-issue limited series, Marvel Knights, 2008—2009)
• War Machine #1-11 (with Leonardo Manco, Marvel Comics, December 2008-December 2009)
• Incredible Hulk #601-present (Marvel Comics, August 2009-ongoing).
• Hercules: Fall of an Avenger #1-2 (with co-author Fred Van Lente and art by Ariel Olivetti, Marvel Comics, March—April 2010)