For drivers, set postal code 408700 in your GPS and you should arrive in a breeze. Car parking can be pretty tricky around Block 3006.
A better option is to park at the Wilson Car Parking (see image right).
When you have arrived at Block 3006, look for the lift lobby which is located in the middle of the elongated building. Take any lift to #04-388.
DON'T take the stairs, it will lead you to a row of backdoors that have no access to GP workshop.
See you. Cheers.