The Gyeonggi Suwon International School "Knights" compete in the Korean-American Interscholastic Activities Conference (KAIAC). The following athletic programs are open to all officially enrolled GSIS upper secondary School students who have met the academic and medical requirements. The following sports will be offered:
Gyeonggi Suwon International School believes that the opportunity for participation in a wide variety of co-curricular activities is a vital part of every student's educational experience. These activities contribute to the development of learning skills that enable the student to maximize their educational experience at GSIS. The students are given opportunities to develop their interests and talents at a variety of levels. We offer many programs for all the different age groups and the options change as more staff, parents and outside groups get involved. Most are offered on Tuesday afternoons but some meet other days as well.