You are surprised.
Jongak Branch: Go to Jongak Subway Station. (Line 1) exit 6. 50m on the left Hyundai Coex Branch: Go to the Samsung Subway Station (line 2) It's in the food court area of the Hyundai Dept. Store B2. Gangnam Finance Center Branch: Go to Yeoksam Subway Station (line 2). Enter the GFC near exit #2(underground) and walk thru the revolving doors. Walk straight, you can't miss it. (We're on the B2 level)