The largest ape that ever walked the Earth, Gigantopithecus blacki, lived in what is now China and went extinct between 295,000โ215,000 years ago.
๐ Height: ~3 meters (9.8 ft)
โ๏ธ Weight: 200โ300 kg (441โ661 lbs)
๐ธ Image: Paleo-anthro sculptor Bill Munns with his Giganto reconstruction in his Los Angeles backyard.
The Gigantopithecus has nothing to do with Gorillas, it was a specie which lived between 6 millon and 200.000 years ago and with an estimated hight between 2,7 - 3m. Means that the recreation of the photo is correct, except, like also Gorillas he moved mostly over legs and arms.
The Gigantopithecus is the largest extinct primate and the gorilla is the largest extant primate. They are both primates. So are humans but we already have an idea about how big humans can get.
Edit: I should have included something on the average size of gorillas though since these Giganto sizes are approximately averages.