No this is just an extention that lays in the pelican pond, they have two more islands that you can see in the background and an they also have an extension at the back of the darkgrey building that you can see on the left sid of this picture. new extension at the back of the Gibbon house | ZooChat : and these are the two islands. Gibbon island almost finished | ZooChat
Well before they added the two extensions and the new Climbing frames it looked dated and a little to small for 1.1.2 Gibbons, but thats just my humble opinion