Gimple grew up in Berkeley Heights, New Jersey, and graduated from Governor Livingston High School. He graduated from the University of Southern California's School of Cinema-Television.
Gimple was a writer on NBC's Life and Fox TV's Drive, and ABC's FlashForward. He co-wrote the script of Ghost Rider: Spirit of Vengeance alongside Seth Hoffman and David S. Goyer.
He has also worked on Disney's Pepper Ann and as a writer for Simpsons Comics. Gimple created the cartoon Fillmore! and the comic book Heroes Anonymous with Bill Morrison.
In 2011 he joined the crew of AMC's The Walking Dead as a producer and writer for the second season. He wrote the episodes "Save the Last One ", "Pretty Much Dead Already ", and "18 Miles Out " (with Glen Mazzara ), and "Hounded ", "Clear ", and "This Sorrowful Life " for the third season . In January 2013, following the departure of Glen Mazzara as showrunner, it was announced that Gimple would succeed him. Despite being showrunner, Gimple continues to write episodes, with at least two episodes written or co-written by season as of Season 8. In January 2018, it was announced that Angela Kang would succeed Gimple as showrunner for Season 9 while he would serve as Chief Content Officer for the whole franchise.
- The Day Will Come When You Won't Be
- Bury Me Here
- The First Day of the Rest of Your Life (with Angela Kang & Matt Negrete)
Episodes Written (Fear)
- The Hollywood Reporter Interview by Lesley Goldberg (July 11, 2013)