https://www.b-prisma.de/anwender/kostenlos
- Simple GDL Objects for free Download
a path through the web to GDL sources
https://www.b-prisma.de/anwender/kostenlos
https://archicad-talk.graphisoft.com/viewforum.php?f=6
http://www.cadprojekt.hu/gdl_work_01.html
https://centralinnovation.com/archicad/cadimage-tools/
https://www.archisolutions.com//store/GDL-new.html
http://www.langelaan.com/0_MLIB.html
http://www.ddgi.com/object_shop/d3sp-shop01.html