Un esempio:

codice:
var map = new GMap2(document.getElementById("mymap"));
var bounds = new GLatLngBounds();
var point1 = new GLatLng(latitude, longitude);
var point2 = new GLatLng(latitude, longitude);
bounds.extend(point1);
bounds.extend(point2);
map.addOverlay(new GMarker(point1));
map.addOverlay(new GMarker(point2));
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));