user notification email global footer text

Yes, you can do this. There are two pieces to it:

http://www.gravityhelp.com/documentation/page/Gform_pre_submission_filter
http://www.gravityhelp.com/documentation/page/AutoResponder

You can try something like this:

[php]
add_action('gform_pre_submission_filter', 'add_notification_footer');
function add_notification_footer($form){

        // append your footer to whatever the autoresponder message is from the form builder
        $form['autoResponder']['message'] .= "<p>Thank you for contacting Acme Enterprises. &copy; " . date('Y') ."</p>";

        // always return the form object
        return $form;
}

Modify the footer HTML ("<p>Thank you for contacting Acme Enterprises..." above) and add that code to your theme's functions.php.

I tested it and it worked OK on all forms for me. Let us know if you have any trouble.