Greetings,
I have been wanting to do this for a while and finally had a few free hours to get it done.
I noticed a few other also had this issue. So here it is. A little free Windows tool that will convert Google Maps Coordinates into the format that is directly usable in Navigraph Charts:
You copy the Google Maps coordinates by right clicking in Google Maps
Then paste that into my tool and it will give you the correct format for Charts. So you can add it to your route or make a user Waypoint
I hope this may be useful for some.