Gela is one of the most popular “white” GS themes that also supports Gnome Shell 3.6 since today!
Gela is clean, minimalistic and bright theme that was based on 3 other themes, in an attempt to become the answer on the major availability abundance of dark themes for Gnome Shell.
Gela looks professional and casual at the same time. I personally love it for the attention in details that Golan77 provided. All elements look great, with no excesses or discounts in the general design philosophy followed. I didn’t have enough time to test Gela under 3.6 thoroughly, but I didn’t find any bugs so far. Definitely give this one a try!