Inside the Game we offer a Guild Forum Section.
If you are in a guild, you can access this from the CE Guides tab on the bottom left. Depending on your guild rank, you may only be able to view these messages or edit, reply or even create. Ask your Guild Leader or Officer if you wish to have more access.
Outside the game, we provide a Guild Section within the Forums
The Guild Forum is a place where Guilds can solicit members, post note-worthy news and generally post public communications regarding their guilds.
It is also used for COOPS to post items that specifically affect guild operations.