The DEMO version only includes 10 pages:
http://gtsb.io
http://gtsb.io/services.html
http://gtsb.io/portfolio.html
http://gtsb.io/about-us.html
http://gtsb.io/careers.html
http://gtsb.io/blog.html
http://gtsb.io/contact.html
http://gtsb.io/case-studies/seelk.html
http://gtsb.io/case-studies/e-commerce.html
http://gtsb.io/case-studies/proptech.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www6.waybackmachinedownloader.com/website-downloader-online/scrape-all-files/ to buy a fully functioning site.
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