Rival colors? UF is orange and blue. Or are you just joking around and forewarning not to wear Garnet and Gold (FSU)?
Anyways, you will get mixed recommendations here. I know people who purposely wore either ties or suits that gave them personality and they got into d-school. My belief is that as long as you look good, what you wear is not tacky or doesn't distract people, then it is fine to wear it. People always say wear a black, dark grey, or navy blue suit. Hey, some people look great and very professional in a beige/cream suit. The biggest factor is looking professional. But, being professional doesn't mean you cannot have some personality.
At the interview for the school I am attending, we had guy wear a cream suit with a pink shirt I believe it was a yellow tie. He looked sharp, but very professional. He was accepted.
Can you wear the tie? If it works well with your attire, go for it - especially if you are already a Gator.
I'm saying I don't suggest wearing school colors because it may be over the top, but I suggest avoiding wearing rival colors like garnet/gold or green/orange.