As stated here in the TTW site, the team are now maintaining an independent wiki for the FO3/FNV GECK.
Still in a bare-bones state as I type, it can be added to very easily without having to jump through Bethesda's hoops!
All who use the GECK, or to lesser extent xEdit/scripting tools, for the Fallout games are encouraged to lend a hand where possible.
GECK wiki without Bethesda's oversight.