Two bash functions that interact with github gist public API. It is made for single file gists. You can retrieve the list of gists for a given user and then download a specific gist.

gist-functions.sh

#!/bin/bash
# MIT © Santiago Greco - fsgreco@hey.com
# This file set two bash functions that interact with github gist public API. It is made for single file gists.
# The first one "gist_list" retrieves a list of public gist from a given username (the only param you need to pass).
# The second one "download_gist" downloads the single gist file (need to have 2 params: username and gits_name)

function check_jq() {
	if ! command -v jq &> /dev/null; then echo "Please install 'jq'." && exit 1; fi
}

#e.g. of usage: gist_list fsgreco 
function gist_list() {
	[ -z "$1" ] && echo 'Please give me the username of the user you want gist from' && exit 1
	check_jq
	
	user_name="$1"
	curl -sS -H "Accept: application/vnd.github+json" \
		"https://api.github.com/users/$user_name/gists" | \
		jq 'map( { file: ( .files | keys)[0], description } )'
}

#e.g. of usage: download_gist fsgreco tmux-sessionizer.sh
function download_gist() {
	[[ -z "$1" || -z "$2" ]] && echo 'Please give me the username and the name of the gist you want to download' && exit 1
	check_jq

	user_name="$1"
	file_name="$2"
	curl -sS -H "Accept: application/vnd.github+json" \
		"https://api.github.com/users/$user_name/gists" | \
		jq "map( select( (.files | keys)[0] == \"${file_name}\") )" | \
		jq ".[].files.\"${file_name}\".raw_url" | \
		xargs curl -sS > "$file_name" \
		&& echo "$file_name - downloaded"
}