Is it hard to get into FIT NYC for AMC?

I was wondering what gpa I need to get into FIT for AMC. My gpa is currently 3.1 & i’m a junior in HS. I dont know why I have a low gpa if im ranked in the top 16% of my class! Although my psat scores are really bad. I was wondering if its difficult to get accepted into amc? I’m also really bad at math!