That's more than bright enough for most human activities...(particularly when one considers the IQ of the average follower of mohammadanism...)
Sorry, I just couldn't resist.
You get the point however. Neither gorillas nor any of the hominids, are/were related to humans in any way despite being bright enough to associate with humans. Gorillas were very likely originally put here to help with the heavy lifting. They need to be rescued. Putting them in "preserves" is absolutely the wrong approach; they need to be integrated into industrialized societies and get back to doing the kinds of things they were cut out to do, at least two or three days out of the week. Tasks which are all but impossible for humans, like heaving leftover V8 engines in junkyards and fixup shops up into trucks, would be an ordinary day at the office for a silverback gorila.