Does the Engager allow a GPS Tracking Function?

A: Yes, If you want to offer your client to make usage of GPS tracking function during a call it is possible to build it into the content, e.g.:

navigator.geolocation.getCurrentPosition(GetLocation);

function GetLocation(location) {

    alert(location.coords.latitude);

    alert(location.coords.longitude);

    alert(location.coords.accuracy);} 

Link to specs: http://dev.w3.org/geo/api/spec-source.html

Just remember to assure connectivity while detailing!