I posted this fairly recently in another thread; most are in/near Bundang. When you go, take a camera and notebook. Get the gym info, look for busses, subways, take navigational photos, etc and post the gyms
Some gyms in Seongnam are
TAPOBAN in Jeongja-dong, 141-3 031)715-8238/011-711-3765 (map at: http://cafe.daum.net/tapoban
분당 헬스 암벽 Bundang Health? Cliff in 분당구 야탑동 533-7 중앙 퍼지마트 205호 Yatap-dong 533-7 Chungang peoji Mart 205-ho 031)707-6577
Seongnam Spider Climbing Center, 수정구 태평1동 5120번지 Sujeong-gu, Taepyeong-1 dong, 5120 tel: 031)753-8848. It's near Kyungwon University and Taepyeong Stations, on the same side of the road as the University. It's a block back from the main road, behind a parking lot (I have a bare bones map, but a taxi, even from Suseo would be cheap and you could subway home and tell us how to get there
성남(분당)카스올림픽스포콤 (Seongnam something olympic something) 031)707-9777 is/has a wall, I think. There is a pretty new wall by the stadium (Seongnam-dong) and contact info/photos/map can be found here: http://www.skwall.co.kr/climbing/cbb...e=1&tacnt
I have about 25 listings for Seongnam Climbing shops, so I won't translate!! Not sure how many can gear you up but the gyms will know or a quick walk around town will probably lead you to some. They seem pretty spread out, but a lot in Bundang-gu.
Hope this helps! I have included Korean where I am not sure how to "translate" and where it might be helpful for a taxi driver/KATUSA. Don't forget to bring your camera and a notebook and get bus numbers, business cards etc when you find the gyms/wall, so other people in Seongnam will have an easier time