Gutenberg is a fantastic static site generator. It is likely the fastest generator in existence, it's got an easy-to-use yet powerful templating syntax, and it supports advanced features like syntax highlighting and Sass compilation out of the box.
This quick start guide will give you everything you need to know to build a custom static site, with your own templates, and taking advantage of all of Gutenberg's powerful features. At each stage, you'll be able to see demo sites that show exactly what a site like the one I've described looks like, and you'll be able to see the exact code that generated that demo site—it's all on GitHub, and there'll be links at every step.
In this first part, we'll start with creating a simple, single-page site. It won't be much, but it will give us a firm foundation to build on.