Featured Image - GF

// http://www.gravityhelp.com/forums/topic/display-featured-image-selection-based-on-conditional-logic#post-161066
// change the 98 here to your form ID
add_action('gform_after_submission_5', 'set_featured_image', 10, 2);
function set_featured_image($entry, $form){
	// change $entry['2'] to the field where the radio button
	// image was selected mine was field 2.  The value of that
	// radio button should be the attachment ID
	set_post_thumbnail($entry['post_id'], $entry['14']);


	// Loop through categories assigned to the post and link images to the category archive page

	 $categories = get_categories();
    foreach ($categories as $category) :
        query_posts('cat='.$category->cat_ID);
        while(have_posts()){
            the_post();
            ?>
            <!-- begin post -->
            <li>
            <a href="<?php echo get_category_link($category->cat_ID); ?>"> <?php
    if ( set_post_thumbnail($entry['post_id'], $entry['14'])){

     the_post_thumbnail( );
    } else { ?>

   <img src="<?php bloginfo('template_url'); ?>/images/cfc7cf.png">
  <?php  }


    ?>
    </a>

            </li>
            <!-- end post -->
    <?php     }
    endforeach;