Train them to believe that the football is the banana - and it's their job to get the banana when the ball is hiked and to stop getting the banana when the whistle blows. With this approach - I actually wonder how many takeaways a gorilla DL might have.
As a secondary position - I'd be open to training the gorilla to be a RB.
I'd only put him/her in on running plays, give them the football and teach them that when they get it, it's a game of keep away until they get to the endzone. They can dump truck everyone between them and the endzone on their way. The biggest challenge might be training them to not ever go down on their knees.
Which brings up an entirely different point - perhaps the use of gorillas could lead to more equitable and realistic female participation in football. A female gorilla is still going to be able to rip the arms off of most men - so we won't hear about how women are slower, weaker, etc.
My reply to your post has not diverged enough that it probably belongs under the OP. 🙂