Drop this code into your Genesis child theme functions.php file to force the home page to display with the full width content layout.

FullWidthHome_functions.php

<?php
// Do not copy opening PHP tag above

// Force full width home page layout 
add_filter( 'genesis_pre_get_option_site_layout', 'wsm_full_width_home_page' );
function wsm_full_width_home_page( $opt ) {
	if ( is_front_page() ) { 
		$opt = 'full-width-content';
		return $opt;
	}
}