GP506
GP506 (Hangul: GP506) is a 2008 South Korean mystery thriller film directed by Kong Su-Chang. The film explores a dark, suspenseful narrative centered on a military guard post located within the Korean Demilitarized Zone (DMZ).

Plot
The story begins after an entire platoon is found dead at a remote guard post in the DMZ. During the initial investigation, a soldier is discovered alive but in a coma, clutching a blood-stained ax. As the military investigation progresses, a second survivor is found—the platoon leader—who appears physically unharmed. The investigation becomes complicated as the platoon leader attempts to obstruct the inquiry and escape.
Cast
The film features an ensemble cast portraying military personnel involved in the incident and the subsequent investigation.



| Actor | Role |
|---|---|
| Cheon Ho-Jin | Sergeant Major Noh Seong-Gyu |
| Jo Hyun-Jae | 1st Lt. Yoo Jeong-Woo |
| Lee Young-Hoon | Corporal Kang Jin-Won |
Additional cast members include Lee Jeong-Hun, Yu Tae-Seong, Choi Kyu-Hwan, Yang Ki-Won, Shin Hyun-Tak, Min Sung-Wook, Lee Seung-Hoon, Moon Jae-Won, Lee Won, Koo Sung-Hwan, Kim Byung-Chul, Park Joon-Hyuk, Kim Sung-Bum, Lee Tae-Gum, Yeo Min-Goo, Son Byung-Ho, Park Won-Sang, and Hong Seung-Jin.

Production and Release
The film was written and directed by Kong Su-Chang, who also served as a producer alongside Lim Jeong-Ha and Kim Hwan-Sik. It was released in South Korea on April 3, 2008, with a runtime of 123 minutes. The film was distributed by Showbox. It was screened at the 10th Udine Far East Film Festival in April 2008.