I'm going to add this as an answer instead of commenting as it touches on different topics, particularly the fact that modern infantry isn't fighting in a lot of wide open areas like in the past. An urban environment is what was mentioned and doesn't seem to have been focused on enough.
1. Experience - you describe a scenario where you take already grown gorillas and hand wave them into being intelligent. That's all well and good if you want to educate them to show off at an academic conference, but that is a horrible idea for a soldier. What you are really doing is creating the equivalent of physically superior child soldiers because they have almost zero life experience to draw upon as soldiers. They won't know even the basics about human life and our habitats and teaching this combined with everything else that they need to know to be effective soldiers in an urban environment would take years. 121
Otherwise they'll simply be brawny thugs shooting anything that resembles what you have qualified as a 'bad guy' and most likely being tactically outmaneuver very quickly.
2. Cost - Human soldiers have been the focus for our infantry for thousands of years. Unless you're planning to have had these intelligent gorillas around for a long time, then nothing will have been developed over time to suit them, it will have been adapted for them, and that is a problem. You even mention creating a new kind of 'foot' wear just for these new troops, along with modifications to other equipment. That is simply the beginning, as others pointed out, because they have not evolved for acting as humans do. If this organization decides to suddenly attempt this gorilla soldier idea, then it is going to cost them a ton to get what is likely very little return out of it.
Basically, gorillas are better for the exact opposite of what you're wanting them to do, which is fight in tight, modern, urban environments for a simple reason, they're animals and don't live or operate in these areas naturally. If you wanted melee soldiers for an older style of fighting in mountainous terrain, then they'd be great, but for this I would say no. 376