Accessing Leaflet maps from custom module
I managed to solve the problem in the following way, I hope it save someone time:

(function($) {

var lMap = Drupal.settings.leaflet[0].lMap;

    Drupal.behaviors.test_module = {
        attach: function (context, settings) {
            latlon = settings.test_module.marker;
            //alert(latlon);
            lMap.setView(latlon, 14);
        }
    };

})(jQuery);