A group of gorillas playing against the best football players in history would be like the football players at the #1 college football team in the country playing against a bunch of ten year old kids. Intelligence won't matter. No matter what play you run, the gorillas could squash humans like a bug.
This is not a correct comparison, you're assuming the gorillas are BETTER than a college football team (not just in size, but skill). This is not so.
If you're going to compare something, do it right
The situation is more like taking a body builder, and saying they would be good at golf, because they should be able to, with a little training, out-drive any normal human. This doesn't work though. There's a lot more to it than just drives. Get it?
There's a lot more to football than just smashing people. Have you ever played tackle football?