We have a bunch of working example sites in a bunch of different static site generators at the "pages" group: https://gitlab.com/groups/pages
Jekyll, Middleman, Pelican, Metalsmith, Octopress, Nanoc, etc. etc. All working examples. We also have gitlab-ci.yml templates if you create the YML file via the web editor, so for many of these you can get a simple site deploying pretty quick.
Danger recently moved their site over (https://gitlab.com/danger-systems/danger.systems, https://danger.systems/) if you want another example.
We have a bunch of working example sites in a bunch of different static site generators at the "pages" group: https://gitlab.com/groups/pages
Jekyll, Middleman, Pelican, Metalsmith, Octopress, Nanoc, etc. etc. All working examples. We also have gitlab-ci.yml templates if you create the YML file via the web editor, so for many of these you can get a simple site deploying pretty quick.
And if you want a bit more guidance we have a series of blog posts on static sites & GitLab Pages: https://about.gitlab.com/2016/06/03/ssg-overview-gitlab-page...
Personally I'd recommend Jekyll, but it really depends on what languages you're comfortable in :)
(Shout-out to Marcia, Axil, Kamilt, and others for helping build out Pages and these examples over the last while, really awesome resources!)