Add custom elements for layout.

add_filter('post_grid_layout_elements','post_grid_pro_woo_layout_elements');

function post_grid_pro_woo_layout_elements($elements_group){

    $elements_group['woo'] = array(
        'group_title'=>'WooCommerce',
        'items'=>array(
            'woo_full_price'=>array('name' =>__('Full price','post-grid')),
            'woo_add_to_cart'=>array('name' =>__('Add to cart','post-grid')),
            'woo_categories'=>array('name' =>__('Categories','post-grid')),
            'woo_tags'=>array('name' =>__('Tags','post-grid')),
        ),
    );

    return $elements_group;
}

Screenshot

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