Demo of feeds on map
The different bridges (taxonomy 4 -- green) and churches (taxonomy 8 -- blue) in the photo album can be shown by adding a feed for the :
Javascript is required to view this map.
This is created with a very simple macro:
gmap |id=map |center=54.1517861014307, -120.4541015625 |zoom=5 |width=100% |height=400px |control=Small |type=Hybrid|feed=blue::/taxonomy/term/8/0/feed |feed=green::/taxonomy/term/4/0/feed]
This does not produce the pop-up windows that are customized to content type as the gmap_location.module (see /map/node) can, but it can show content by taxonomy or any other method of creating an RSS feed. Location.module is required to provide the location information into the feed.

Comments
Where are the points?
I see a map, but there aren't any points. Why is this?
Something changed
It seems that something has changed in the feeds and they no longer include the lat/long. I assume this must have been as part of one of the upgrades done to one of the modules or to the core, that lost this functionality.
Maybe someone should fix it....
Maybe someone should fix it, since it's one of the posted demo's for this module.
That would be nice, but I
That would be nice, but I really have no experience and don't have any motivation to start trying to change the feeds that Drupal creates in the 4.7 version. I believe that this may have been done as a security upgrade (limit the information that can be provided in a feed). In any case, it isn't a problem with the gmap.module, it is a problem with the way that drupal supplies the feed information.
Point is taken about the demo linking to this on the Drupal.org site. That write-up should really be overhauled to reflect the current version of the GMap module. However, I haven't been involved in the current version, so it is difficult for me to update it.