FulGaz now offers Power Match support for external powermeter users. If you'd like to use the power data from your powermeter, but still experience the automated resistance controls from FulGaz (either in ERG mode for training or in regular ride mode) you can now do so by enabling Separate Power Meter Support.
Click on the settings "cog" in the top right corner of the main ride screen, then scroll down and select Advanced Trainer Settings.
Check the tick-box next to Separate Power Meter Support.
Exit settings and re-start FulGaz.
From now on, you will be given new pairing options when you open the app again. Select your smart trainer as the controllable source and your power meter as the external power source.