Hi there …
Just a factory for loading GoogleMaps. You can extend it. Just need to call once the init method … 
myApp.factory('MapService', function(
$cordovaNetwork,
$http,
$rootScope
) {
this.init = function() {
if ($cordovaNetwork.isOnline()) {
loadGoogleMapsApi();
}
$rootScope.$on('$cordovaNetwork:online', function(event, networkState) {
loadGoogleMapsApi();
});
}
var loadGoogleMapsApi = function() {
if (!window.google) {
$http.get('https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=true&libraries=places').then(
function(response) {
var scriptReference = document.createElement('script');
scriptReference.setAttribute('type','text/javascript');
scriptReference.appendChild(document.createTextNode(response.data));
document.getElementsByTagName("head")[0].appendChild(scriptReference);
// more instructions like instancing a map ...
},
function(error) { return $q.reject(error); }
);
}
}
return this;
});