Enlisted in the South Korean Military on November 18, 2010. He was officially released from military duty on November 7, 2012
Academically gifted with an IQ of 137, Gang graduated from Hanyang University with a degree in mechanical engineering.
Due to his great athleticism, he can carry out any action stunt. He is skilled in martial arts, including Taekwondo and Boxing, as Horse-riding and swordcraft are his specialties.