This project is a site which use at low level code the "GW2 api client" I wrote.
It allow you to see stuff about your Guildwars 2 account :
I have not the time to make a tutorial to explain you how to host yourself this project.
You can contact me at firstname.lastname@example.org for clever questions (I won't learn you PHP, storage, caching system, and so on ...) if you don't understand something I wrote.
You can see a live instance of it here : http://gw2tool.net/