This is setting a Geo location of “Confusion Corners” in Stuart, Florida:
This setting a Geolocation of Pikes Peak, Colorado:
Looks like the values are in inches. Divide by 12 and the “corners” come out about 11 ft, and the peak ~ 14,095’. Does that sound correct ?
So after picking your spot try to change the Z:
Sketchup.active_model.set_attribute("GeoReference","ModelTranslationZ",value)
It’s worth a shot…