This is a feature I had experienced on Revit and it was really helpful. Gridline is just acting as a line and a marker head can be moved to any location to make the grid shorter. Shorter line for details or other views could solve my problems.
If only we could label Grid Lines!....
I think labeling will solve our all problems like they did on the Zones 🙂
I am totally agree with you, the way Revit does is very helpful and it should be adopted/featured by Graphisoft Archicad