This is untested, but its a diff for /themes/default/views/reports/submit_edit_js.php. You need to use Google Maps instead of OpenStreetMap.

submit_edit_js.diff

diff --git a/themes/default/views/reports/submit_edit_js.php b/themes/default/views/reports/submit_edit_js.php
index 507195e..2ea862e 100755
--- a/themes/default/views/reports/submit_edit_js.php
+++ b/themes/default/views/reports/submit_edit_js.php
@@ -676,43 +676,49 @@
   	 */
 		function geoCode()
 		{
-			$('#find_loading').html('<img src="<?php echo url::file_loc('img')."media/img/loading_g.gif"; ?>">');
-			address = $("#location_find").val();
-			$.post("<?php echo url::site() . 'reports/geocode/' ?>", { address: address },
-				function(data){
-					if (data.status == 'success'){
-						// Clear the map first
-						vlayer.removeFeatures(vlayer.features);
-						$('input[name="geometry[]"]').remove();
-						
-						point = new OpenLayers.Geometry.Point(data.longitude, data.latitude);
-						OpenLayers.Projection.transform(point, proj_4326,proj_900913);
-						
-						f = new OpenLayers.Feature.Vector(point);
-						vlayer.addFeatures(f);
-						
-						// create a new lat/lon object
-						myPoint = new OpenLayers.LonLat(data.longitude, data.latitude);
-						myPoint.transform(proj_4326, map.getProjectionObject());
-
-						// display the map centered on a latitude and longitude
-						map.setCenter(myPoint, <?php echo $default_zoom; ?>);
-												
-						// Update form values
-						$("#country_name").val(data.country);
-						$("#latitude").val(data.latitude);
-						$("#longitude").val(data.longitude);
-						$("#location_name").val(data.location_name);
-					} else {
-						// Alert message to be displayed
-						var alertMessage = address + " not found!\n\n***************************\n" + 
-						    "Enter more details like city, town, country\nor find a city or town " +
-						    "close by and zoom in\nto find your precise location";
-
-						alert(alertMessage)
-					}
-					$('div#find_loading').html('');
-				}, "json");
+			geocoder = new google.maps.Geocoder();
+
+			geocoder.geocode( { 'address': address}, function(results, status) {
+				if (status == google.maps.GeocoderStatus.OK) {
+					// Clear the map first
+					vlayer.removeFeatures(vlayer.features);
+					$('input[name="geometry[]"]').remove();
+
+					point = new OpenLayers.Geometry.Point(results[0].geometry.location.lon, results[0].geometry.location.lat);
+					OpenLayers.Projection.transform(point, proj_4326,proj_900913);
+
+					// create a new lat/lon object
+					myPoint = new OpenLayers.LonLat(data.longitude, data.latitude);
+					myPoint.transform(proj_4326, map.getProjectionObject());
+
+					// display the map centered on a latitude and longitude
+					map.setCenter(myPoint, <?php echo $default_zoom; ?>);
+
+					// Get the country
+					var country = results[0].formatted_address;
+					for (var i=0; i < results[0].address_components.length; i++) {
+						for (var b=0;b < results[0].address_components[i].types.length;b++) {
+							if (results[0].address_components[i].types[b] == "country") {
+
+								country = results[0].address_components[i].long_name;  
+								break;
+							}
+						}
+					}			
+
+					// Update form values
+					$("#country_name").val(country);
+					$("#latitude").val(results[0].geometry.location.lat);
+					$("#longitude").val(results[0].geometry.location.lon);
+					$("#location_name").val(results[0].formatted_address);
+
+				} else {
+					alert('Geocode was not successful for the following reason: ' + status);
+				}
+
+				$('div#find_loading').html('');
+			});
+
 			return false;
 		}
 		

Full function at: https://gist.github.com/dkobia/6763274