hisher_gists.user.js

// ==UserScript==
// @name           His/Her Gists!
// @namespace      http://hail2u.net/
// @description    Insert a link to his/her Gists page in his/her profile page.
// @include        http://github.com/*
// @exclude        http://github.com/*/*
// ==/UserScript==

// console.time("hisher_gists");

// generate Gist URL
var gist_url = location.href.replace(/^https?:\/\/github.com/, "https://gist.github.com");

// generate link for Gist
var gist_link = '<dl class="gist"><dt>Gists:</dt><dd><a id="profile_blog" href="' + gist_url + '" class="url">' + gist_url + '</a></dd></dl>';

document.getElementsByClassName("first")[0].innerHTML += gist_link;

// console.timeEnd("hisher_gists");