How to show a map within a node using gmap and location modules
In the display settings of your content type, you should be able to change the value to "Map only" or "Adress with Map".

Then it should display it as a GMap.

I use:


GMAP
GMAP Location
Node Locations
Location CCK


I think you're missing Location CCK, in order to get the Map stored as a field in the content type.

Otherwise, if you use the content Location, I think the map is available as a block (not sure about this one).