Arena is now available for Linux. The Windows version supports TB's so hopefully the Linux version does also. Look here ---->> http://www.playwitharena.com/?Download
Edit: The Shredder interface is excellent and a Linux version is available. It's not free, though.
Look here ---->> http://www.shredderchess.com/chess-software/linux.html
I am currently using SCID for chess stuff but I found out that tablebase support is disabled for Linux due to conflict with debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=280741
Does anyone know any GUIs that allow tablebase support or will I have to use wine or something?