Here's a GPX of a ride I did in Silver City a couple of years back. I did this one on my DRZ-400 and took my son on his Honda 50. I wouldn't personally take my GS on this ride, but with enough experience it's doable. Most sections are a 3, with some in 4 territory.
The eyes of the ranger are upon you.
2000 Suzuki DR-Z400
2005 BMW R1200GS
2003 Yamaha V-Star 1100
1978 CX-500 Scrambler (in progress)
Here it is in google maps: I do day rides to Silver City several times a year and occasionally over the back to Jorden Valley Leslie Gulch and up to Homedale on a long run. I'll try to get a challenge run in when the snow clears. For anyone wondering how I do a gpx to google maps conversion I use https://www.gpsvisualizer.com
https://www.google.com/maps/d/edit?mid=1o5Z63F1G3CFcxnNNKn2mlcPukXlZMLA&usp=sharing