Not sure if this is mentioned anywhere already, but I kinda hated how you can't zoom out with the automap included in the Gilbertus client.
You can manually edit the code to add your own zoom levels, but that's a bit too advanced to explain here. Instead, you can take the easy route and simply make the map display the tiles much smaller, so you can see more of them at once.
To do this, open up map.html in Notepad and search for the following:
tileSize: new google.maps.Size
and
new CoordMapType(new google.maps.Size
After both of these will be a set of coordinates, like (100, 100) if you haven't already edited it. Change both instances of these coordinates to smaller values in order to 'zoom out' the viewing area. Using (50, 50) for example will double the number of tiles displayed. Keep the ratio 1:1, because our tiles are square.