Use an alternative source for DataTables files.

gravityview-datatables-alt-src.php

<?php
/*
* Plugin Name: GravityView - Use Alternate DataTables Sources
* Description: Use CDNJS.com sources for the DataTables library
* Version: 1.0
* Author: Katz Web Services, Inc.
* Author URI: https://gravityview.co
*/

class Replace_GV_DataTables_Scripts {

	function init() {
		new Replace_GV_DataTables_Scripts;
	}

	function __construct() {

		add_filter('gravityview_datatables_script_src', array( $this, 'datatables_js') );
		add_filter('gravityview_datatables_style_src', array( $this, 'datatables_css') );

		add_filter('gravityview_dt_tabletools_script_src', array( $this, 'tabletools_js' ) );
		add_filter('gravityview_dt_tabletools_style_src', array( $this, 'tabletools_css' ) );

	}

	function datatables_js() {
		return '//cdnjs.cloudflare.com/ajax/libs/datatables/1.10.1/js/jquery.dataTables.min.js';
	}

	function datatables_css() {
		return '//cdnjs.cloudflare.com/ajax/libs/datatables/1.10.1/css/jquery.dataTables.min.css';
	}

	function tabletools_js() {
		return '//cdnjs.cloudflare.com/ajax/libs/datatables-tabletools/2.1.5/js/TableTools.min.js';
	}

	function tabletools_css() {
		return '//cdnjs.cloudflare.com/ajax/libs/datatables-tabletools/2.1.5/css/TableTools.css';
	}
}

add_action( 'init', array('Replace_GV_DataTables_Scripts', 'init' ) );