gistfile1.txt

:javascript
	function initMap() {
	
		var myLatLng = {lat: #{@user.latitude}, lng: #{@user.longitude} };

		var map = new google.maps.Map(document.getElementById('map'), {
			center: myLatLng,
			zoom: 17
		});

		var marker = new google.maps.Marker({
		    position: myLatlng,
		    title:"Hello World!",
		    map: map
		});
	}
	
	
	
	https://developers.google.com/maps/documentation/javascript/markers