Gun Atthaphan Phunsawat is a Thai actor signed under GMMTV. He started to study Business Administration at Bangkok University before switching his studies to Political Science at Ramkhamhaeng University.

At a young age, Gun entered the entertainment industry supported by his mother who knew about her son's ambitions. He auditioned for film companies and became the first winner of The Boy Model Competition 2003. He had his first lead role in 2004's "Gomin", one of his more popular works domestically.

He won the Best Supporting Actor award at the 7th Chalerm Thai Awards and the Performance of the Year at the Bioscope Awards 2015. For his performance in the 2018 TV series "The Gifted", he won 'Best Fight Scene' at the LINE TV Awards (2019) and Best Actor in a Supporting Role at the 24th Asian Television Awards (2020).

Outside his acting career, Gun owns the clothing brand GENTE, a beauty products brand called Gun’s Shine Glow Gun, and co-owns another clothing brand Too Cute To Be Cool. He is a co-owner of the café Last House on the Right.