Making your Genesis Footer Fluid by "breaking it out" of your main site container.

Genesis Footer Fluid

/* Fluid Footer */
remove_action( 'genesis_footer', 'genesis_footer_markup_open', 5 );
remove_action( 'genesis_footer', 'genesis_do_footer' );
remove_action( 'genesis_footer', 'genesis_footer_markup_close', 15 );

add_action( 'genesis_after', 'genesis_footer_markup_open' );
add_action( 'genesis_after', 'genesis_do_footer' );
add_action( 'genesis_after', 'genesis_footer_markup_close' );
/* end Fluid Footer */