Compatible with DokuWiki
No compatibility info given!
Download and install the plugin Command and then follow the instructions there on installing custom commands.
”Gist is a simple way to share snippets and pastes with others. All gists are git repositories, so they are automatically versioned, forkable and usable as a git repository.”
Just put in %gist(gist_id)% wherever you'd want to embed the gist.
Report them on the comments page.