@Onychorhynchus coronatus Yes, the gorillas and mangabeys live together both indoors and outdoors. The mangabeys do have an indoor space and an off-show outdoor space to their own which the gorillas cannot access.
See the link below for a detailed description of this exhibit at ZooLex. There are also quite a few more pictures in the gallery, by myself and others.
This in my opinion is one of the top gorilla facilities I've seen.
