[Plugin: Gravity Forms – Update Post] how do I initialize form before update

I want to include some information from the post being updated on the post update page. For this I need the post_id. Where do I get this from? To illustrate, I would like the following page display ghe form and the post id.

[gravityform id="1" name="Library Submission" title="false"]

<?php
echo $post_id;
?>

Robert Ramey

http://wordpress.org/extend/plugins/gravity-forms-update-post/