Reply To: Setting the 1st Gallery Image as Default Drop down image

I think I actually managed to find a possible solution. I did a bit of research and placed this custom code to the functions.php file in your theme directory:

// Ajax Search Pro - Getting the first WooCommerce gallery image as the featured image
add_filter( 'asp_results', 'asp_get_woocommerce_gallery_first_image', 10, 1 );
function asp_get_woocommerce_gallery_first_image( $results ) {
  foreach ($results as $k=>&$r) { 
    if ( isset($r->post_type) && $r->post_type == 'product' ) {
		$product = wc_get_product($r->id);
		$attachment_ids = $product->get_gallery_image_ids();
		if ( isset($attachment_ids[0]) ) {
			$r->image = wp_get_attachment_url( $attachment_ids[0] );
		}
    } 
  } 
  return $results;
}

From what I can see, where the gallery is available, I am seeing the first image as the results featured image.