Graphisoft has released a GDL extension for Visual Studio Code. This is a development environment for Archicad 24 GDL language (XML, HSF and GDL source code), allowing more productive library development. It has syntax highlighting, gdl-specific themes, code outline, snippets and reference guide.
http://gdl.graphisoft.com/gdl-extension-for-vs-codeEin Editor mit Zeillen, Highlightning, CodeSnippets etc
Holger Kreienbrink
Director Product Intelligence
Munich, Germany
Archicad since Version 5....
If I sound too harsh, please forgive me: I am German.