open gh file on startup

gh_autoload.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
""" 
Usage: gh_autoloaded.py

This script attempts to load a grasshopper(.gh) file if it shares the same name as the current
rhino(.3dm)file, and is placed in the same directory.

Note:
This script uses the RhinoCommon library to locate the current ActiveDocument.
"""

# - - - - - - - - IMPORTS

import os
import Rhino

# - - - - - - - - FUNCTION

def try_load_grasshopper():
    
    file_3dm = Rhino.RhinoDoc.ActiveDoc.Path;
    if file_3dm is not None:
        file_gh = file_3dm.replace('3dm', 'gh')
        
        if os.path.exists(file_gh) and os.path.isfile(file_gh):
            Rhino.RhinoApp.WriteLine('\nFile Found: {}\n'.format(file_gh))
            cmd = '_-Grasshopper Document Open {} _Enter'.format(file_gh)
            Rhino.RhinoApp.RunScript(cmd, False)
            return True
        
        Rhino.RhinoApp.WriteLine('\nNo File Found.\n')
        
    Rhino.RhinoApp.WriteLine('\nGrasshopper was not loaded: Current Rhino file is not saved.\n')
    return False

# - - - - - - - - RUN SCRIPT

def Run():
    try_load_grasshopper()

if __name__ == "__main__":
     Run()