Sorry .. I think a few of us have had problems accessing the support forums the last few days so I've only just seen that, but it looks like you've answered your question :p
As far as I'm aware, it's just the double square brackets thing - but not ever having used a wiki before I used the one on our GL site, I didn't have any expectations of more.
I did find (an old) video that GL made some time ago which I believe should still be relevant:
But that basically says the same thing.
You can have a browse through ours if you like, although I've not added much to it for some time. We tend to use the forums now, more often than not, for things like guides .. simply because then people can add their own ideas and info.