It's RHEL. Or rather, it's CentOS with the serial numbers filed off. Of course you can. It is a snapshot of an old version of Fedora, with a lot of extra Q&A,

It's RHEL. Or rather, it's CentOS with the serial numbers filed off. Of course you can. It is a snapshot of an old version of Fedora, with a lot of extra Q&A, and an extremely restricted set of packages. E.g. you get GNOME and nothing else. But if you don't need many drivers, or you're running on old hardware that is directly supported, sure you can run it as a desktop.