A simple Portfolio Archive Grid in Genesis. https://sridharkatakam.com/a-simple-portfolio-archive-grid-in-genesis/

archive-portfolio.php

<?php

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

add_filter( 'body_class', 'sk_body_class' );
/**
 * Adds a css class to the body element
 *
 * @param  array $classes the current body classes
 * @return array $classes modified classes
 */
function sk_body_class( $classes ) {
	$classes[] = 'archive-portfolio';
	return $classes;
}

/**
 * Display as Columns
 *
 */
function be_portfolio_post_class( $classes ) {

	if ( is_main_query() ) { // conditional to ensure that column classes do not apply to Featured widgets
		$columns = 3; // Set the number of columns here

		$column_classes = array( '', '', 'one-half', 'one-third', 'one-fourth', 'one-fifth', 'one-sixth' );
		$classes[] = $column_classes[$columns];
		global $wp_query;
		if( 0 == $wp_query->current_post || 0 == $wp_query->current_post % $columns )
			$classes[] = 'first';
	}

	return $classes;
}
add_filter( 'post_class', 'be_portfolio_post_class' );

// Remove the entry title (requires HTML5 theme support)
remove_action( 'genesis_entry_header', 'genesis_do_post_title' );

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

// Remove entry header markup
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_open', 5 );
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_close', 15 );

// Remove entry meta from entry footer incl. markup
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_open', 5 );
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_close', 15 );
remove_action( 'genesis_entry_footer', 'genesis_post_meta' );

// Remove the post image (requires HTML5 theme support)
remove_action( 'genesis_entry_content', 'genesis_do_post_image', 8 );

// Display Featured image in the entry content
add_action( 'genesis_entry_content', 'sk_show_featured_image' );
function sk_show_featured_image() {
	if ( $image = genesis_get_image( 'format=url&size=portfolio' ) ) {
	printf( '<div class="portfolio-image"><a href="%s" rel="bookmark"><img src="%s" alt="%s" /></a></div>', get_permalink(), $image, the_title_attribute( 'echo=0' ) );
	}	
}

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

genesis();

functions.php

// Register a custom image size for Portfolio images
add_image_size( 'portfolio', 700, 440, true );

// Add Archive Settings support to Portfolio CPT
add_post_type_support( 'portfolio', 'genesis-cpt-archives-settings' );

style.css

/* Portfolio Archive
--------------------------------------------- */

.archive-portfolio .entry {
	padding: 0;
}

.archive-portfolio .entry .portfolio-image a {
	display: block;
	padding: 16px;
	border: 1px solid rgba(0,0,0,0.1);
	opacity: 0.6;
	background: #fcfcfc;

	-webkit-filter: grayscale(100%);
	filter: grayscale(100%);
}

.archive-portfolio .entry .portfolio-image a:hover {
	border: 1px solid rgba(0, 0, 0, 0.2);
	opacity: 1;
	background: #fff;

	-webkit-filter: grayscale(0);
	filter: grayscale(0);
}

@media only screen and (max-width: 800px) {

	.archive-portfolio .entry {
		margin-bottom: 40px;
	}

}