In order to maintain geographic diversity, UF sometimes limits the number of acceptances from one high school. It also tends to place more emphasis on GPA vs test scores. If the OP has a low class rank and lots of kids from the high school apply there, Gainesville should not be considered a safety.
The OP should be looking for schools that place more emphasis on test scores than GPA. Schools like Vanderbilt have this reputation. The following thread might be helpful.