Nice, i quite like the controller, it has a good feel, and I have one that obviously is not going to be used to play stadia games! Which is a shame, Stadia worked really well for me most of the time.
If you haven't already, be sure to convert it to Bluetooth mode from WiFi before the end of December or you won't be able to use it anymore...I only found this out after trying to set it up with my Retropie. The link to the google web tool to convert it is here!
I don't have one but it really annoys me that so many stadia controllers are gonna be ewaste just becouse people didn't know that they could be converted to Bluetooth mode, but only till the end of 2023
It would probably involve needing to make a custom firmware for the controller in order to redirect it to a different server, and to reimplement its Wifi pairing.