[Plugin: GD Star Rating] WP_Query Sorting Problem

Why is this snippit not sorting pages properly? It returns records, but not sorted by gdsr_sort.

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
           $the_query = new WP_Query(
               array(
                        'gdsr_sort' => 'rating',
                        'gdsr_order' => 'asc',
                        'post_type' => 'page',
                        'posts_per_page' => 10,
                        'paged' => $paged,
                        'post_parent' => $parent
                    )
           );

https://www.ads-software.com/extend/plugins/gd-star-rating/