Registration Hooks don’t appear to be working

Use the Gravity forms gform_user_registered hook. It fires after the registration and will return the $user_id.

function my_auto_login( $user_id ) {
wp_set_auth_cookie( $user_id, false, is_ssl() );
wp_redirect( admin_url( 'profile.php' ) );
exit;
}

add_action( 'gform_user_registered', 'my_auto_login' );