http://sridharkatakam.com/full-width-header-navigation-metro-pro/

gistfile1.txt

add_action( 'genesis_before', 'genesis_do_subnav' );

gistfile2.txt

add_action( 'genesis_before', 'genesis_do_subnav', 4 );

gistfile3.txt

remove_action( 'genesis_header', 'genesis_header_markup_open', 5 );
remove_action( 'genesis_header', 'genesis_do_header' );
remove_action( 'genesis_header', 'genesis_header_markup_close', 15 );

add_action( 'genesis_before', 'genesis_header_markup_open', 5 );
add_action( 'genesis_before', 'genesis_do_header' );
add_action( 'genesis_before', 'genesis_header_markup_close', 15 );

remove_action( 'genesis_after_header', 'genesis_do_nav' );
add_action( 'genesis_before', 'genesis_do_nav', 16 );

style.css

body {
	background: #E2DECF;
}

.site-container {
	margin-top: 0;
}

.nav-secondary {
	background: #111;
}

.site-header {
	background: url('images/wrap.png') repeat-x;
}

.site-title {
	margin-bottom: 0;
	margin-top: 9.5px;
	margin-top: 0.95rem;
}

.nav-primary {
	border-top: 1px solid #111111;
	background: url('images/subnav.png') repeat-x;
}

.site-container {
	margin-top: 3.2rem;
	margin-top: 32px;
	margin-bottom: 3.2rem;
	margin-bottom: 32px;
}

.site-inner {
	padding-top: 0;
}

@media only screen and (max-width: 1139px) {
	.title-area {
		width: auto;
	}
}

@media only screen and (max-width: 1023px) {
	.site-header .widget {
		margin-bottom: 0;
	}
	.site-title {
		margin-top: 18px;
		margin-top: 1.8rem;
	}
	.site-header .widget-area {
		width: 300px;
	}
}

@media only screen and (max-width: 768px) {
	.site-header .search-form {
		margin-bottom: 0;
	}
	.site-header .widget-area {
		width: 100%;
	}
	.title-area {
		float: none;
	}
}

@media only screen and (max-width: 500px) {
	.nav-primary {
		background: #333;
	}
}