https://github.com/juanjosegarciaripoll/gtd-drive

It uses Safari as a front-end and works with toot and cl-who. The patches for toot are available here

https://github.com/juanjosegarciaripoll/toot

Feedback welcome :-)

Juanjo

--
Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain) 
http://juanjose.garciaripoll.googlepages.com