You can add sea of glass to the godaddy joomla install no problem. But getting it to look like the demo you would need to import the SQL dump or install the site shaper.
Not sure how godaddy works so here is what you need:
The sql dump = you need access to phpmyadmin or a similar database program where you can import/export.
Site shaper = you need a new database created, you would need a username/password assigned to it.
Thanks for the helpful post. I use Godaddy so was unsure they would work.