I've been wanting to know this because i would be very interested in creating one.
If you are talking about a BYOND guild, then the answer is yes, you can. This is one of the many benefits that come with a BYOND membership.
In response to Schnitzelnagler
Ah, thank you! Could you please tell me how?
In response to Roxas
Visit My Account -> Manage Account -> Guild
In response to Schnitzelnagler
Thank you once again.