<script src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=geometry,places&ext=.js"></script>
<script src="https://cdn.rawgit.com/googlemaps/v3-utility-library/master/markerwithlabel/src/markerwithlabel.js"></script>
<p>With MarkerWithLabel you can easily modify a standard marker to include an identifying character of your choice. In this case the marker is superimposed with the letter "A".</p>
<div id="map_canvas" style="height: 400px; width: 100%;"></div>
<div id="log"></div>