Hi, Bhanu
I think you are looking for this.
http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manage...
And, there is also another work around for this, just get your GTM library and place that inside the <head> section of your page.
The example snippet looks like this,
<!-- Google Tag Manager --> <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-XXXX');</script> <!-- End Google Tag Manager -->There might be <noscript> version of library as well for the browsers with JavaScript disabled. You can place that snippet right after the start of <body> tag of your page.
<!-- Google Tag Manager (noscript) --> <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-XXXX" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <!-- End Google Tag Manager (noscript) -->
Also, you can use different versions based on runmode for your non-prod and production by checking ${runMode == 'prod'} or ${runMode != 'prod'}.
Hope this helps.
Thanks,
Vamsi
