I wanna make an VM with win10 to play games

I wanna make an VM to play games, but, i saw that to have a better peformance i need to isolate my GPU, what that means? i’ll not be able to use my GPU in my Manjaro system?
I need to have a second GPU to make this VM? i can make a VM to play games or not?
I have an AMD CPU and an Nvidia GPU.
I found this tutorial, and was thinking to try it:

Win10 is not a Manjaro issue neither is a Win10 based VM for games.