hi,
I heard that audio assault is working on a new program. No info on their website. And because I don’t have any facebook or anything like that, I contacted them directly. The answer is ReAmp.
I bought it now and I can only recommend it to the guitarists 
The Linux version will be in the final release.
https://www.audioassault.mx/gm3.php
They assured me that every program or VST they create from now on will have a linux version.
I tried the windows version and I’m excited.