His gimbal appears to work already with the controller so it is just the video link he needs to fix ... click that link Pierre and open your Phantom, you need to check all the connections.
Phantom WiFi = 2.4 / GoPro WiFi = 2.4 = conflict, the GoPro needs to use video out via the USB socket or the rear port for his to work as described in that thread, they do not pair the GoPro WiFi with the Phantom WiFi, it is done with leads.
Phantom WiFi = 2.4 / GoPro WiFi = 2.4 = conflict, the GoPro needs to use video out via the USB socket or the rear port for his to work as described in that thread, they do not pair the GoPro WiFi with the Phantom WiFi, it is done with leads.