Did you ever get a good working example of GWD files working with GS?
I've been holding off on using the platform, waiting for all the kinks and bugs to calm down...
Right now I'm leaning more towards Adobe Animate to start incorporating more timeline character animations, but I would be interested to find out what the GWD + GreenSock setup looks like.
I've been using GreenSock since the Flash days for banner and digital magazine builds. Most of my banners are for the entertainment industry and involve a video player for a movie trailer, and then resolves with an end-frame animation, were I use the GreenSock timeline to animate the movie-key-art. I'm still not convinced that moving away from hand building my banners would be a good thing. So far GWD and Adobe Animate just seem like a big pain in the butt - but I wanted to be sure I was not missing out on any advantages gained by mobile templates, gallery templates, character animation, etc.
I'd love to hear about banner workflows that others find useful!