Activate Rhino/Grasshopper inside via own pyRevit toolbar

I’m new to pyRevit and have started our own pyRevit toolbar in Revit.
In this toolbar I allready have some Dynamo scripts, some links and a test python script working.
However in our office we have a lot of Grasshopper inside Revit scripts, which I like to add to our own pyRevit toolbar.
Unfortunately I haven’t found out how to set this up…
Can anyone help me figure out how to set this up?