At the beginning, you will arrive Kwun Tong community health center building. Go upstair or take the lift. It is located in 8 Yuet Wah Street, under the Park Metropolitan.
Just introduce a nice place to see the night view of kwun tong, The GZ is in public area. you can take the path and go to Yue Wah Street.
the coordinate might a bit off around 3m.
Jnu uhat vf jnvgvat lbh.