Where do I learn to use GtkD

[karabuta via Digitalmars-d-learn]

Gtk3 from python3 has got I nice book with examples that are not 
so advanced but enough to get you doing real work(from a beginner 
point of view). GtkD seem to have changed the API structure 
compared to python3 Gtk3 and the demo examples just "show-off" 
IMO :). The documentation is really^ not good :)

Any help on where I can get better leaning materials(GtkD)? Repo, 
blogs post, etc please