The GUI is available on Linux – my main development is Arch Linux, in fact. That the official Arch Linux package doesn't include the new GUI yet is known; there are
two issues about that already. If you want to speed things up you should offer them your help or at least speak up in those reports.
Note that even though I develop on Arch I'm not an Arch Linux maintainer myself. As Arch is usually very fast with releasing package updates I don't offer binaries for Arch myself either.