ghpythonlib is a library that allows to use Grasshopper geometry functionality as a simple functions.
This is intuitively also its limitation: only components that act as pure functions work. If they work for other side effects or purposes (like looping, in Galapagos, or like the Timer, for expiring, or Vector/Text display, for displaying things without returning anything) there will be no useful way to use them.
When available they will actually run, but they run in their own Cluster and nothing will appear.
I personally would suggest to use this functionality to simplify big definitions, or create reusable functions. I would just use normal components for vector display or text tag.
for Robert McNeel & Associates