Register and display Portfolio CPT

archive-portfolio.php

<?php
/**
 * The custom portfolio post type archive template
 */

/** Force full width content layout */
add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

/** Remove the post info function */
remove_action( 'genesis_entry_header', 'genesis_post_info', 12 );

/** Remove the post content */
remove_action( 'genesis_entry_content', 'genesis_do_post_content' );

/** Remove the post image */
remove_action( 'genesis_entry_content', 'genesis_do_post_image', 8 );

/** Remove the post title */
remove_action('genesis_entry_header', 'genesis_do_post_title');

/** Add the featured image after post title */
add_action( 'genesis_entry_header', 'mp_portfolio_grid' );
function mp_portfolio_grid() {
  if ( has_post_thumbnail() ){
		echo '<div class="portfolio-featured-image">';
		echo '<a href="' . get_permalink() .'" title="' . the_title_attribute( 'echo=0' ) . '">';
		echo get_the_post_thumbnail($thumbnail->ID, 'portfolio' );
		echo '</a>';
		echo '</div>';
	}
}

/** Remove the post meta function */
remove_action( 'genesis_entry_footer', 'genesis_post_meta' );

genesis();

register-cpt.php

/**
 * Register Custom post types
 */
add_action( 'init', 'cd_post_type' );
function cd_post_type() {
  // Portfolio custom post type
	register_post_type( 'portfolio',
		array(
			'labels' => array(
				'name' => __( 'Portfolio' ),
				'singular_name' => __( 'Portfolio' ),
			),
			'has_archive' => true,
			'public' => true,
			'rewrite' => array( 'slug' => 'portfolio' ),
			'supports' => array( 'title', 'editor', 'genesis-seo', 'thumbnail' ),
		)
	);
}