gpbua-set-redirect-url-by-user-role.php

<?php
/**
 * Gravity Perks // GF Better User Activation // Set Redirect URL by User Role
 * http://gravitywiz.com/documentation/gravity-forms-better-user-activation/
 */
add_filter( 'gpbua_activation_redirect_url', function( $url, $activation ) {
  
  	// Enter the roles and redirect URLs
  	$redirects = array(
		'subscriber' 	=> 'https://google.com',
		'editor'	=> 'https://bing.com',
	);

	/**
	 * @var $activation GPBUA_Activate
	 */
	$feed = $activation->get_signup()->config;
	$meta = rgar( $feed, 'meta' );
	$role = rgar( $meta, 'role' );
	
	if( array_key_exists( $role, $redirects ) ){
		$url = $redirects[ $role ];
	}

	return $url;
}, 10, 2 );