addBGMPInfoWindowPermalink

function addBGMPInfoWindowPermalink( $placemarks )
{
    $newPlacemarks = array();

    foreach( $placemarks as $placemark )
    {
        $post = get_page_by_title( $placemark[ 'title' ], 'OBJECT', 'bgmp' );
        $placemark[ 'details' ] .= get_permalink( $post->ID );
        $newPlacemarks[] = $placemark;
    }

    return $newPlacemarks;
}
add_filter( 'bgmp_get-map-placemarks-return', 'addBGMPInfoWindowPermalink' );