Adding entries as posts with visibility: private

Hi,

Just wondering if there's a way I can save a form entry as a blog post with visibility: private using Gravity Forms?

Ideally, when the user completes a form they will be able to check a checkbox which allows them to make their submission private.

On submission, if this checkbox has been selected, then the entry should be saved as a private post, otherwise the entry would save as a regular post with public visibility.

Hi, it looks like prij got his form working, I've got a slight variation on this. I'd like to make all posts generated by my form private. I'm also using the GF custom post types plugin to make the form generate a custom post type called 'submissions' rather than a regular post, which I hope doesn't complicate things too much. I don't want the privacy to be conditional on the answer to any of the form questions, I just need all 'submissions' to be visible only to administrators. Actually, it could be any logged in user, but it must be invisible to the public.

Any ideas? Here is the test form:

http://www.christopherkrauskopf.me/test/blu/new-form-test/

OK - I'm not sure if I did this right or not, but it doesn't seem to be working. I put the code below in my functions.php - then I submitted the form which created a new 'submission' but it was still set to public.

// update '39' to the ID of your form
add_filter('gform_post_data_39', 'set_post_private');
function set_post_private($post_data){
    global $post;
    $post_data['post_status'] = 'private';
    return $post_data;
}

Once again the form is here: http://www.christopherkrauskopf.me/test/blu/new-form-test/

The theme is Nova by Elegant Themes. I really appreciate your help.