Place Python Script in the Python folder

The script:

import geosoft.gxapi as gxapi
import geosoft.gxpy as gxpy

# a python script must have a rungx(), which is executed by OM when the script is run
def rungx():

    # get the current gx context
    gxp = gxpy.gx.GXpy()

    # say hello to the user identified by gxp.gid.
    gxapi.GXSYS.display_message("GX Python", "Hello {}".format(gxp.gid))

Place this in ../user/python folder:

Create a menu file

Create a menu file (with extension .omn) in your C:\Program Files\Geosoft\Desktop Applications 9\user\omn folder. For example, the following menu file named MyPython.omn will present Hello as an option to the user:

/ My Python extensions
/------------------------------------------------------------------------------

MENU "MyPython"
ITEM "Hello"   ,hello_world_extension.py

Place this in the ../user/omn folder:

Load the Menu

Your user will load the menu into an open project by selecting the Manage Menus... button  which will open the menu manager.  Your custom menu will appear under User Menus:

Run the Script

Once the menu is loaded, MyPython will appear among the Geosoft menus. Select the Hello option: