You can include Gists from a GitHub workspace in your Confluence page.
Add the macro
You can either:
/ Include GitHub Gistand
ENTERto add and edit the macro, or
click in the editor toolbar on Insert > Other Macros and select the Include GitHub Gist macro (located in the category “External Content” of the macro library).
You will then be prompted to specify the following:
URL of the Gist from GitHub
Format/ language for highlighting purposes (auto detect is performed by default)
Tick to display number of lines in the file
Tick to hide header of files rendered
Collapses the file content and gives the option to expand and collapse