Google Sites vs WordPress: What are the differences?
Developers describe Google Sites as "A structured wiki- and Web page-creation tool *". It is a free and easy way to create and share webpages. Its goal is for anyone to be able to create simple web sites that support collaboration between different editors. On the other hand, *WordPress** is detailed as "A semantic personal publishing platform with a focus on aesthetics, web standards, and usability". The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.
Google Sites and WordPress are primarily classified as "Website Builder" and "Self-Hosted Blogging / CMS" tools respectively.
WordPress is an open source tool with 12.7K GitHub stars and 7.78K GitHub forks. Here's a link to WordPress's open source repository on GitHub.