Create custom page sidebars in Genesis (WP): PHP

<?php

genesis_register_sidebar( array(
'id'            => 'id-of-new-sidebar',
'name'            => __( 'Blog Category Page Sidebar'),
'description'    => __( 'This is the blog category page sidebar section.' ),
) );

add_action( 'get_header', 'child_sidebar_for_page' );

function child_sidebar_for_page() {
	if ( is_category('blog') || is_single() ) {
		remove_action( 'genesis_after_content', 'genesis_get_sidebar' );
		add_action( 'genesis_after_content', 'get_sidebar_for_page' );
	}
}

function get_sidebar_for_page() {
	echo '<div id="specific-id-of-new-sidebar">';
	genesis_before_sidebar_widget_area();
	dynamic_sidebar( 'id-of-new-sidebar' );
	genesis_after_sidebar_widget_area();
	echo '</div>';
}

?>

Create custom page sidebars in Genesis (WP): Source

http://digitcodes.com/show-custom-sidebar-for-specific-pages-in-wordpress-using-genesis/