Is there documentation anywhere of what each filter in GMIC does?

I've looked at the GMIC wiki and the reference page on the GMIC site, and though the former does list what each filter does, it doesn't have a page that lists and links to the page for each filter, so it's nigh impossible to navigate unless I have a specific filter in mind.

G'MIC web site has everything you need.
G'MIC Reference PDF
G'MIC Wiki
G'MIC visuals

No, there are no specific documentation for each filter available in the G'MIC plug-in for GIMP.
That should be a very nice idea to have some available, but as you can imagine, this represents a huge amount of work.
If someone wants to write some docs, you can always do it on the wiki page of course