gp-nested-forms-reorder-columns.php

<?php
/**
 * Gravity Perks // GP Nested Forms // Reorder Nested Form Field Columns
 *
 * Reorder the columns in the Nested Form Field summary table.
 *
 * @version  0.1
 * @author   David Smith <david@gravitywiz.com>
 * @license  GPL-2.0+
 * @link     http://gravitywiz.com/documentation/gravity-forms-nested-forms/
 */

// Update "123" to the ID of your form.

add_filter( 'gform_form_post_get_meta_123', function( $form ) {

	foreach( $form['fields'] as &$field ) {

	        // Update "4" to the ID of your Nested Form field.

		if( $field->id == 4 ) {

		        // Update "5", "6" and "7" to the desired field IDs from your child form.

			$field->gpnfFields = array( 7, 5, 6 );

		}

	}

	return $form;

} );