No kidding.
I've been practicing MMA for 6 years now, boxing in parallel for 7 years, I could.
I've been weight training for 4 years, 1m87 for 86 kg
I have a crazy speed, and reflexes identical to my speed. I just have to wait for him to charge me, dodge him and give him a good pat on the head. I won't drop him at the slightest mistake, the gorilla is finished. You'll always have some smart guys here who think it's impossible. Nothing is impossible with willpower, folks, and 2) you're not going to do anything with your cowardly body.
Any trained man can defeat a gorilla with a knife. With bare hands it's not necessarily more complicated, it just requires technique.