The Universal Transverse Mercator (UTM) coordinate system is a grid based system for specifying locations on the earth's surface. UTM consists of 60 zones, each with its own local Transverse Mercator projection. The Wikipedia site http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system has more information about UTM.
This Google Mapplet was created to display the UTM grid zones and labels on interactive maps. The current version allows the user to change the grid line color for better visualization over different backdrops.
Click this link http://dominoc925-pages.appspot.com/mapplets/utmgrid.html to run the mapplet.