this is Bjorn. Hows it goin... Anyways, I use the 7 string D'Addario set. Top sting is a 56 guage, and I throw away the extra 7th string. so its 13-56. I don't really remember what the guages are inbetween. On GWC, we used a blend of amps (line 6, mesa boogie, soldano), so what you hear is not a pod sound.
This time around (for our new album) we will be using a Line 6 Pod XT and a Mesa TriAxis.