wp custom register post type calling

wp custom register post type calling

<section id="content">
		<?php $image_gallery=new WP_Query(
			array(
			'post_type'=>'zBoom_gallery',
			'posts_per_page'=>20,
			)); ?>
	<div class="wrap-content zerogrid">
	
		<div class="row block03">

			<?php while($image_gallery->have_posts()):$image_gallery->the_post() ?>
			<div class="col-1-4">
			
				<div class="wrap-col">
					<article>
						<?php the_post_thumbnail(); ?>
						<h2><a href="<?php the_permalink(); ?>"><?php the_title();?></a></h2>
					</article>
				</div>
					
			</div>
		<?php endwhile; ?>


		</div>