For my part all the games in 3d do not work or not long !!!! (Except in streaming)
Check out my video: https://youtu.be/GxcxvXgpaTc
At 11'26, 12'53 and 13'26 :-(
It is a burden of not being able to play 3D games !! And the return policy seems complicated ...
So for some series of GPD WIN it is impossible to play games in 3D, and we are full of contributors in this case!
If you are excited, I invite you to be cautious and wait for fixes on the part of GPD hoping that the bugs can be corrected software.