create google maps polyline from gpx file $_GET

gmap-polyline

$.ajax({
  type: "GET",
  url: "URL to the GPX file",
  dataType: "xml",
  success: function(xml) {
	var points = [];
	var bounds = new google.maps.LatLngBounds ();
	$(xml).find("trkpt").each(function() {
	  var lat = $(this).attr("lat");
	  var lon = $(this).attr("lon");
	  var p = new google.maps.LatLng(lat, lon);
	  points.push(p);
	  bounds.extend(p);
	});

	var poly = new google.maps.Polyline({
	  // use your own style here
	  path: points,
	  strokeColor: "#FF00AA",
	  strokeOpacity: .7,
	  strokeWeight: 4
	});
	
	poly.setMap(map);
	
	// fit bounds to track
	map.fitBounds(bounds);
  }
});