Can’t get in Speech pathology program because of GPA

So I go my acceptance letter from St.Johns university and I found out that I was not accepted for the Speech language and audiology program. Prior to applying to SJU I attended Borough of Manhattan community college and I was undeclared nursing. I didn’t do so well with the science classes so my GPA is really low. I was accepted at SJU for hospitality management but I really want to work with children who need speech therapy. I’m more serious now about school because I want to have a career so I’m willing to do whatever it takes. Can you guys please give your input on how I can achieve a higher GPA so I can get accepted into any school that offers SLP?

Lehman College and Hunter offers a program in SLP if you are looking to stay in NYC.