Google conversion tracking not executed

Hello,

I am trying to include a Google Adwords conversion tracking code into my confirmation message. I disabled autoformatting.
But conversions are not executed somehow.

The tracking code looks like this on the confirmation page:

<!-- Google Code for Webcallback Conversion Page -->
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = 1008917062;
var google_conversion_language = "fr";
var google_conversion_format = "2";
var google_conversion_color = "ffffff";
var google_conversion_label = "kLj1CLKd2gMQxrSL4QM";
var google_conversion_value = 0;
alert('bbb');
/* ]]> */
</script>
<script type="text/javascript" src="http://www.googleadservices.com/pagead/conversion.js">
</script>
<noscript>
<div style="display:inline;">
<img height="1" width="1" style="border-style:none;" alt="" src="http://www.googleadservices.com/pagead/conversion/1008917062/?value=0&label=kLj1CLKd2gMQxrSL4QM&guid=ON&script=0"/>
</div>
</noscript>

It looks like the closing CDATA tag is:
/* ]]> */
But should be:
/* ]]> */
I guess it has something to do with the conversion not executing?

You can test the form here:
http://www.talenco.com/nos-formations/etre-rappele/

I hope you can help or fix the cdata closing tag problem.
Thanks.

PS: I want to use Text confirmation, not Page or Redirection.

Actually it's not related with Gravity Forms, but Wordpress engine edits cdata closing tags.
See: https://core.trac.wordpress.org/ticket/3670

wp-includes/pos-templates.php line 164:

function the_content($more_link_text = null, $stripteaser = false) {
	$content = get_the_content($more_link_text, $stripteaser);
	$content = apply_filters('the_content', $content);
	//$content = str_replace(']]>', ']]>', $content); // I had to remove this line
	echo $content;
}

Now I have to check if this was the only problem and if conversion is now executed correctly.