Hi @jez
Could you please try this code:
$args = array(
'posts_per_page' => 4,
'post_type' => array( 'page', 'news-articles', 'about-gorilla','involved' ),
'orderby' => 'meta_value_num',
'meta_key' => 'home_order',
'order' => 'ASC',
'meta_query' => array(
array(
'key' => 'home_page',
'value' => 'yes',
'compare' => '=',
),
),
);
I hope this helps.