- opengdl.org
- GDL-Projects as Open Source Project
- Platform for development of free GDL objects.
Category: Documentation
GDL Paper and Web documentation sources
selfGDL
- https://www.selfgdl.de
- selfGDL is the detailed command reference of all known GDL commands from GDL enthusiasts Frank Beister and Jochen Suehlo.
Specifiation of Libraries
- Part of Graphisofts support documentation for GDL developers about specifiation of GDL libraries.