List pages by page template

list-pages-based-on-page-template.php

<?php

$args = array(
	'posts_per_page' => -1, // List All page
	'post_type'  => 'page',
	'meta_query' => array(
		array(
			'key'     => '_wp_page_template',
			'value'   => 'page-template.php', // Your page template name, If you have page template in a directory like: page-templates, then you should specify it like: page-template/page-template.php :)
			'compare' => '='
		)
	)
);
$page = new WP_Query( $args );

print_r( $page );