Garmin and Google Maps Rated 4 out of 5 stars

Agree ... the "how to use this" is hard to find:
Go here ... http://my.garmin.com/locate/google-sendtoGPSHelp.htm

Install the plug-in, define the point in Google Maps, then click "Send" in the upper right corner.

This review is for a previous version of the add-on (2.7.3.0).