Wordpress plugin that fixes an issue with WP Better Emails not being able to format Gravity Forms email notifications.

gravityforms-wpbe-fix.php

<?php
/**
 * Plugin Name:       Gravity Forms - WPBE Email Fix
 * Plugin URI:        https://gist.github.com/bdeleasa/d3bff35069a9a025c82a
 * Description:       Wordpress mu-plugin which fixes an issue with WP Better Emails not being able to format Gravity Forms email notifications.
 * Version:           1.0.0
 * Author:            Brianna Deleasa
 * Author URI:        https://briannadeleasa.com
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       gravityforms-wpbe-fix
 * Domain Path:       /languages
 */


add_filter( 'gform_notification', 'gravityforms_wpbe_gform_notification', 10, 3);
/**
 * Changes the Gravity Forms notification emails from HTML to plain text.
 *
 * @see https://docs.gravityforms.com/gform_notification/
 * 
 * @param $notification array
 * @param $form object
 * @param $entry object
 * @return array
 */
function gravityforms_wpbe_gform_notification( $notification, $form, $entry ) {

    // is_plugin_active is not availble on front end
    if( ! is_admin() )
        include_once( ABSPATH . 'wp-admin/includes/plugin.php' );

    // Check if WPBE is installed and activated
    if( ! is_plugin_active('wp-better-emails/wpbe.php') )
        return $notification;

    // change notification format to text from the default html
    $notification['message_format'] = "text";
    
    // disable auto formatting so you don't get double line breaks
    $notification['disableAutoformat'] = true;

    return $notification;

}

It is a great help, thanks.