GW2 has a great API to get some information about ingame things.
https://wiki-de.guildwars2.com/wiki/API
Maybe you could add some data about the guild
- what's needed to buy/build something for the gh
- a list of the members
- maybe some automated feed for important guild-achievements.
I don't know much about it specifically but I am sure there is a way to all these things, and I am sure you find information about something alike in the webs.
This is rather a topic for later when the website is stable and used :) But still a suggestion.
yeah this is a great idea, once all the basics are in place ill look to see if this is also possible :)