Installing Google Tag Manager on EVERY page in Zoho Sites website

Installing Google Tag Manager on EVERY page in Zoho Sites website

Hi,

I wish to add Google Tag Manager to every page in my website ( www.storyweaver.com).  Installing Tag Manager requires both tracking code in the header of each page and in the body of each page. 

Is there a way to place both the header and the body text into every page on the site, rather than adding the heading via individual page headers and the body as individual and manual page code blocks? 

Best regards,
Joe