You see gray, because the default gps coordinate of Electric Mobile Studio is 90,52. This point doesn't lay on the world map! (I had the same problem)
So first zoom out completely and then scroll down all the way until you can see the map.
However, there is another problem: If I double-click on the map the GPS ccordinates don't get set! The simulator instances always use the default coordinates (which are nonsense).
Please help us here!