I grew up in SW Florida where I still live. When I was in high school in the 70s a pre-teen girl was snatched and killed by a gator while she was swimming in a roped-off freshwater swimming area in the local state park. A gator won't consume large prey all at once, but take it to sort of an underwater lair to "age." A rescue diver with the sheriff's department later told me that working that particular case to recover the body was about the worst thing he ever had to do.
Gators are nearly always no problem as long as you go your way and you let them go theirs. And never feed them like the visitors and new transplants seem to do.