Archive template file for the Tours custom post type.

archive-tours.php

<?php
/**
 *  Archive template file for the Tours custom post type
 *
 * @package    spiralWebDB\GenesisDeveloper
 *
 * @since      1.0.2
 *
 * @author     Robert A. Gadon
 *
 * @link       http://spiralwebdb.com
 *
 * @license    GNU General Public License 2.0+
 */

namespace spiralWebDB\GenesisDeveloper;

add_action( 'pre_get_posts', __NAMESPACE__ .'\modify_query_vars_if_archive' );
/**
 *  Modify the default Query Vars for the custom post type.
 *
 * @since 1.0.2
 *
 * @param array $query_vars Array of query variables to modify for the custom post type.
 *
 * @return array $query_vars
 */
function modify_query_vars_if_archive( $query_vars = array() ) {

	if( is_post_type_archive( $post_type = 'tours' ) )    {

		$query_vars = array(
			'post_type' => 'tours',
			'order'     => 'ASC',
			'orderby'   => 'menu_order',
		);

		foreach ( $query_vars as $var => $value ) {
			set_query_var( $var, $value );
		}
	}

	return $query_vars;

}

Make sure to add the file path name to the child theme's autoload.php file so it gets preloaded before initializing the Genesis framework (parent theme). Then the preregistered callback will get registered and the callback will fire.

No need to include genesis(); at the end of the file if preloading the archive template in the child theme. Once the template file is preloaded, initialize Genesis and the template will run when called.