These files are accessible for import via "https://deno.land/x/examples/".
Try it:
> deno https://deno.land/x/examples/gist.ts README.md
Add this to your .bash_profile
export GIST_TOKEN=ABC # Generate at https://github.com/settings/tokens
alias gist="deno https://deno.land/x/examples/gist.ts --allow-net --allow-env"