Step 1: In Xcode: File -> New -> File -> Resource -> GPX File -> Next -> Give the GPX file a name(It’s Taipei in this example) -> Create

Step 2: Edit the GPX file

<?xml version="1.0"?>
<gpx version="1.1" creator="Xcode">
    <wpt lat="25.041865" lon="121.551361"> // Edit the latitude and longitude 
        <name>Taipei</name> // Edit the name of the location
        <time>2014-09-24T14:55:37Z</time>
    </wpt>
</gpx>

Step 3: When the simulator is running:

http://i.stack.imgur.com/QZMlP.png

You can repeat this process to create multiple locations.