I have succesfully added the moon gorilla to the demo.
In this download are two versions; one has the Moon Gorilla Spawned at Glass Lairs, the other has it made at them.
It is very strong and useful. You'll like it a lot!
WARNING: Do not send infantry to kill one. They will be massacred.
Glass Lairs are one of the random buildings on the Summer's Heat Maps, including Summer's Heat, Grassy Foothills, and Harsh Steppe. Please note that the building does not always get generated in, so try a few times until it's there (if you're lucky you'll get it first go).
Thanks for downloading my mod. I hope you enjoy it.