Here at ENEA we decided to take the initiative regarding the CGL compliance when it comes to the Yocto Project.
For this we started the work on a dedicated layer called 'meta-cgl' which can be accessed / cloned from here:

 http://git.enea.com/git/?p=linux/meta-cgl.git
 git clone git@...:linux/meta-cgl

Have a look of the things we got there so far, please remember that there is still plenty of work to be done (layer architecture, CGL requirements coverage mode and so on).
It is a little bit more than a stub layer, consider it a starting point for the direction we would like to have with this layer.

Any input is much appreciated, lets keep the discussion by this email thread and see where it goes.