To use this on{X} Recipe, simply copy the code below and modify if needed.

  // You can use http://www.getlatlon.com to get the lat/lon of a location.

////////////////////////////
// Begin Setup Variables  //
////////////////////////////

var locations = [
////////////////////////////
// Add fences here        //
////////////////////////////
    {name:'My House', latitude:'XXXXXXXX', longitude:'XXXXXXXX', radius:100},
	{name:'OReillys', latitude:'XXXXXXX ', longitude:'XXXXXXX', radius:100},
    {name:'Deaville Home', latitude:'XXXXX', longitude:'XXXXXXX', radius:100},
    {name:'Shop', latitude:'XXXXX', longitude:'XXXXXX', radius:50}
    
////////////////////////////
// Stop adding fences     //
////////////////////////////
];
var friend = {name:'Kimber', phoneNumber:'805XXXXX'};	
        //   {name:'Gabe', phoneNumber:'805XXXXX'};

    //Friend to respond to
var messageText = 'where are you';								// The exact text to respnd to
var provider = 'CELL';									// Location Provider type to use (GPS,CELL,PASSIVE,HYBRID)

////////////////////////////
// End Setup Variables    //
////////////////////////////

////////////////////////////
// Begin Rule Logic       //
////////////////////////////
//This is to avoid double text message issue I was getting
var triggered = false;
var physicalLoc = '';

// Convert value to radians
function toRad(value) {
	return value * Math.PI / 180;
}

// Is a given point with a given geofence?
function inGeoFence(currLat, currLong, geoLat, geoLong, geoRadius) {
	//Derived from http://www.movable-type.co.uk/scripts/latlong.html
	var R, dLat, dLon, a, c, d;

	R = 6371; // mean radius of Earth in km
	dLat = toRad((geoLat - currLat));
	dLon = toRad((geoLong - currLong));
	currLat = toRad(currLat);
	geoLat = toRad(geoLat);

	a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.sin(dLon / 2) * Math.sin(dLon / 2) * Math.cos(currLat) * Math.cos(geoLat);
	c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
	d = R * c * 1000;

	return d > geoRadius ? false : true;
}

console.log('////////////////////////////');
console.log('// Starting up the script //');
console.log('////////////////////////////');

// Register callback on sms received event
device.messaging.on('smsReceived', function (sms) {
    if (sms.data.from === friend.phoneNumber && sms.data.body.toLowerCase() === messageText) {
        //We got a "where?" text message
        console.log('Recieved a "where?" text.');

        //Reset triggered value
        triggered = false;

        // getting location from the provider specified above, time interval is 100 milliseconds
        var locListener = device.location.createListener(provider, 100);

		locListener.on('changed', function (signal) {
            // stop listening to location changed events after getting the current location
            locListener.stop();

            if(!triggered) {
                triggered = true;

                var mapUrlPattern = 'http://maps.google.com/maps?z=1&t=m&q=loc:lat+lon';
                var mapUrl = mapUrlPattern.replace(/lat/g, signal.location.latitude).replace(/lon/g, signal.location.longitude);

                physicalLoc = '';
                //Check current location against defined geo fences and we are in one change the mapUrl to the name of the location
                for(x = 0; x < locations.length; x++) {
                    if(inGeoFence(signal.location.latitude, signal.location.longitude, locations[x].latitude, locations[x].longitude, locations[x].radius)) {
                        mapUrl = locations[x].name;
                        physicalLoc = locations[x].name;
                        break;
                    }
                }

                //Log current location
                if(physicalLoc !== '') {
                    console.log('Current location according to the ' + provider + ' provider: ' + signal.location.latitude + ',' + signal.location.longitude + ' (' + physicalLoc + ')');
                } else {
                    console.log('Current location according to the ' + provider + ' provider: ' + signal.location.latitude + ',' + signal.location.longitude);
                }

                // sending text message with the current location
                device.messaging.sendSms({
                    to: friend.phoneNumber,
                    body: 'Hi, I am here: ' + mapUrl
                }, function (err) {
                    if (err) {
                        console.error('Error sending text message: ' + JSON.stringify(err));
                    } else {
                        console.log('Successfully sent SMS.');
                    }
                });
		    }
		});

		locListener.start();
	}
});
////////////////////////////
// End Rule Logic         //
////////////////////////////