I've been messing around with gedit and Geany which both support syntax highlighting for many languages but not for CNC/GCode. And neither have made it easy to make a custom language color scheme.
On windows I used Notepad++ to edit my GCode. It was pretty easy to set it up so that any G-command was green or and M-command red, and XYZ movements in Yellow etc... I'd like to do the same thing with Gedit but I don't know how. Help?