Thanks for all the kind words.

Yes, adding UTM coords and grid is on the enhancement list.

Gary, you're looking too hard for something that does not exist. There is no download link.
Gmap4 runs entirely online.
Nothing to download.
Nothing to install.
Nothing to buy.

Wanna start with a world map?
Here ya go:
http://www.mappingsupport.com/p/gmap4.php?ll=38.259207,-16.760195&t=t1&z=2