I have asimilar problem. I have the newest version of GCC and I have updated the wifi module.

Ive setup the wifi connection also per GHL USA youtube video excactly. but i cannot connect by using the GHL control center over Wifi. The GHL control center says it cannot find my device.

When i look in the control center (via USB) it says it is connected. Also connected with MyGHL.
It has gotten an IP and when i ping the IP i get an response.
The light on the P4 shows green and flickers sometimes.
I can connect to my GHL perfectly (no problems). But it is impossible to connect by using GCC over Wifi.