I couldn't find this on Ausjeep but did find a site which links to a valid download
HERE right click the link in red in the third paragraph and save as. The download will take a while depending on your connection as the document is 67MB (2059 pages) and well worth the wait.
I had a quick look for othe G.C. models but only found spare parts catalogues, could be worth further investigation though. I hope this hasn't already been posted
It's already saved me as it has the real wiring diagram for the Infinity amp as opposed to the nearly there attempt on WJJeeps...