APC works like a charm when making a woo product on the front end. However, when I print the array of meta saved by this process, there are only a handful there.
If I then load the WP admin page for this new product and simply hit Update without changing anything, loads more are added.
How can I add in an action to do that update post action after the GF form is processed?
You can use the gform_post_submission action hook in WordPress to trigger an update for the post after the Gravity Forms form is processed. The code would look something like this:
This hook is a handy tool for developers, as it is called after the form is submitted, and allows you to perform additional actions, such as updating a post. In this case, you use the wp_update_post function to update the post with the ID specified in the $post_id variable.