"FEAR GDL NO(W) MORE!"
(free after David Collins, Athen)
Suggestions for improvements, remarks (e.g. on dead links, orthography-, grammar- or gar textual errors) and questions because of incomprehensibility will be warm welcome
and correctes as soon as possible.
For questions belonging to GDL objects on the other hand is the support of Graphisoft responsible
Help to programing questions you can also get in the well known web forums.