Gollum is wiki software that uses Git as the backend storage mechanism, and written mostly in Ruby.

[4] Currently it is used by GitLab server to store and interconnect wiki-pages with wiki-links, but the plan is to move complete away from Gollum in the future.

[5] Gollum wikis are simply Git repositories that adhere to a specific format.

Gollum pages may be written in a variety of formats including Markdown, AsciiDoc, ReStructuredText, Creole and MediaWiki markup.

[6] Editing the pages can be done via the provided web interface, via its API or with a text editor directly in the Git repository.