Hide Listings from Non-logged in users

This seems to do it…

	add_action( 'init', 'tr_hide_custom_type_search', 99999 );

	function tr_hide_custom_type_search() {
		global $wp_post_types;

		if ( post_type_exists( 'gd_place' ) ) {

			// exclude from search results
			$wp_post_types['gd_place']->exclude_from_search = true;
		}
	}