The structure of the Gorilla indoor areas is still there, the dividing walls between the exhibit areas etc. You can't see much of it though as the nocturnal exhibits are built into it, but in the main AyeAye exhibit you can still see the metal doors in the walls. There were five indoor exhibit cages and sleeping dens in a basement area/service passage below them. No doubt some is still there, probably used as service area.
Outside there are now Keas, Red Pandas and Fruit Bats. The site of the Kea/outside bird enclosure was the Orangutans. The Gorillas occupied the outdoor areas of the other two exhibits.