Hello,
Through a lot of trial and error I could get the Google Collection NIK filters (which are available with no cost in the Official Website) to run as standalone applications.
Here is how I did it:
https://github.com/ericoporto/NikInGimp
Unfortunately, I would like a simpler way to do this installation - the best I can think of, would be a nice bash script.
Anyway, aside this, I would like to run these filters, that can be ran through PlayOnLinux, in Gimp from the plug-in menu. Is it possible?