You have to setup map and then add marker. For example:
$(document).ready(function(){
var lat = 32.311042;
var lng = -106.781458;
var center = new google.maps.LatLng(lat, lng);
var mapOpt = {
center: center,
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
$('#map_canvas').gmap(mapOpt);
$('#map_canvas').gmap('addMarker', {'position': '32.311042,-106.781458', 'bounds': false});
});
And changing zoom parameter you will get different level of details.
Update: example at jsbin