There is no official Windows 10 Pro edition called “GamerOS” by Microsoft. The term refers to:
Typical modifications in such “GamerOS” builds: windows 10 pro gameros 190452130 windows 1 new
Security trade-offs:
These OS versions often come with pre-tweaked registry entries that prioritize foreground applications (your games) over background services. They may also include custom "Ultimate Performance" power plans enabled by default to prevent the CPU from idling or downclocking during intense sessions. There is no official Windows 10 Pro edition
The biggest danger is the source. These ISOs are usually distributed via torrents or file-hosting sites. There is a non-zero chance that the uploader has embedded a keylogger, cryptominer, or trojan into the OS image. Typical modifications in such “GamerOS” builds: