<ace:gMapControl> gives the user an easier method to access the various control options that are available in Google maps.
Options are set as name:value, and are separated by commas.
Relevant section of the Google Maps API: Map Marker
A few good example options are 'flat:true', which will remove the 3d 'shadow' from the marker, and 'draggable:false', which will force the marker into one position.