When I applied to various schools around here, all seemed to know I was a mutant since I had my education both at Xavier's and the school in Attilan. One man asked me straight out in an interview (the reason I didn't go there), but at a few others it was clearly implied.

On the other hand, there are a few scholarships specifically for mutants, if I remember correctly. Mr. Haller gave me some information about that. So you can also use it to your advantage if you want.