Hi,
if you want your web site and logo to show
here you just have to add the guild's URL in game, in the guild panel. Then place an image called logo.jpg in the main directory of your web site. For example if your site is http://myawesomeguild.info your logo must be at http://myawesomeguild.info/logo.jpg
In case you cannot place a picture in that specific location (some free sites do not allow it), we can load your logo on our site with a manual procedure and then link it to the guilds page. So if that's your case post here the URL of your logo and the guild name, and we will load it.