In order to disband a guild the Guild Master will need to speak with the Guild Manager in Capital Asperon. Additionally the guild warehouse must be empty before requesting to disband the guild.
Once the Guild Master has submitted the disband request a notification mail is sent out to all members of the guild and the guild goes into a Disband Pending state that lasts 24 hours.
The expected disband time is displayed in the main Guild page. This pending state allows the Guild Master to cancel the disband request if they change their mind.