Vayu Robins

This plugin will help you manually reorder or sort the images attached to your post, custom post type or page. Once installed and activated you can choose which post type or page you want this functionality on. All the images attached to that specific post or page will then be listed on the post-edit page in the admin. You will then be able to drag & drop the images in the order you want them to be listed.
This will only affect those images uploaded to the specific post or page.
Insert images into post/page with this shortcode: <code>[list_attached_images]</code> 
Her are some parameters
<ul>
<li>imagesize: ie. thumbnail, medium, large</li>
<li>numberimages: ie. -1, 0, 5</li>
<li>imagelink: link to the image file – false/true</li>
<li>order: ie. desc, asc</li>
<li>listclass: use your own class</li>
</ul>
Example: 
 [list_attached_images imagesize=”large” numberimages=”3″ imagelink=”true” order=”asc” listclass=”my-images”]
Here is the php code that will help you display the images in your theme:
<pre><code>$thumb_id = get_post_thumbnail_id( get_the_ID() );
$args = array(
 'post_type' => 'attachment',
 'post_mime_type' => 'image/jpeg',
 'orderby' => 'menu_order',
 'numberposts' => -1,
 'order' => 'ASC',
 'post_parent' => get_the_ID(),
 'exclude' => $thumb_id // Exclude featured thumbnail
);
$attachments = get_posts($args);
if ( $attachments ) :
 foreach ( $attachments as $attachment ) :
 echo wp_get_attachment_image( $attachment->ID, 'full' );
 endforeach;
endif;
</code></pre>
<h3>Website</h3>
http://vayu.dk/reorder-entry-images/

Reorder Entry Images

Get all the attachments (images only) that belong to a post/page/post-type and display them in a list. This list can be reordered by drag and drop.

Travis Lopes

ForGravity

<blockquote>
<h4><a href="https://cosmicgiant.com/plugins/entry-automation/?utm_source=wordpress&utm_medium=readme&utm_campaign=readme" rel="nofollow ugc">Entry Automation for Gravity Forms</a> makes entry deletion more powerful and allows you to export your entries too!</h4>
Entry Expiration started out as a simple tool to automatically remove your old form entries. But what if you need more control over when entries are deleted? Want to apply conditional logic to target specific entries? Or maybe delete specific field values rather than the whole entry? Need to generate an export file before getting rid of those entries?
<a href="https://cosmicgiant.com/plugins/entry-automation/?utm_source=wordpress&utm_medium=readme&utm_campaign=readme" rel="nofollow ugc">Check out Entry Automation</a> today!
</blockquote>
When integrating Gravity Forms with a third-party service, it’s often not necessary to keep entries around after a short period of time as you already have the data imported elsewhere.
Entry Expiration for Gravity Forms allows you to automatically delete Gravity Forms entries older than a defined timeframe. After activating the plugin, set the oldest age for an entry on the Entry Expiration Settings page. At midnight, the plugin will delete all entries on enabled forms that are older than the time you set.

Entry Expiration for Gravity Forms

This is a great solution to automatically delete form entries after a specific amount of time like a month.

This was instrumental for our GDPR compliance of our contact form.

Great Plugin for GDPR compliance

Automatically remove old form entries on a custom, defined schedule

Reorder Entry Images vs Entry Expiration for Gravity Forms