$ gh gist create --help
Create a new GitHub gist with given contents.

Gists can be created from one or multiple files. Alternatively, pass "-" as
file name to read from standard input.

By default, gists are private; use '--public' to make publicly listed ones.


USAGE
  gh gist create [<filename>... | -] [flags]

FLAGS
  -d, --desc string       A description for this gist
  -f, --filename string   Provide a filename to be used when reading from STDIN
  -p, --public            List the gist publicly (default: private)

Every gist is a Git repository, which means that it can be forked and cloned. If you are signed in to GitHub when you create a gist, the gist will be associated with your account and you will see it in your list of gists when you navigate to your gist home page.

Gists can be public or secret. Public gists show up in Discover, where people can browse new gists as they're created. They're also searchable, so you can use them if you'd like other people to find and see your work.

Secret gists don't show up in Discover and are not searchable. Secret gists aren't private.