I just did this with my desktop pc when I added a second drive for additional storage. Instead of using it as additional storage for windows like I initially intended, I decided to dual boot with Mint on the second drive.
So far, I haven't had any issue with gaming on Mint, either! Granted, most of the games I play are through Steam and either work with Proton or are native Linux to begin with. I did install a few games with Lutris, though, and works fine so far. Sea of Thieves, Astroneer, Slay the Spire, Deep Rock Galactic, are all working out of the box.
Only thing I haven't attempted yet are multiplayer games with active anti-cheat, like LoL or CS:2. If those are the sorts of games you regularly play, you'll probably be better off in the Windows partition/drive, but have fun experimenting in Linux!