HrblsI own a G305 and I noticed some jitter whilst playing the other night.
Anecdotally my WiFi router is less than 2 feet from my mouse and receiver as well. I will try disabling the 5GHz range and report back.
the mouse runs at 2.4GHz so you would have to disable that and use 5GHz, but not all devices can use 5GHz so tread carefully