At the moment there is no way of currently doing this other than maybe booting everybody out of the guild and giving the guild house to another if you used gems to purchase (dunno if they are actually tradeable so that's just a theory) and even if you did that all gold spent on member rises is wasted and the guild has to be remade
Please add in a method of doing this so guild leaders such as myself who are bored with the game yet feel a sense of duty to all the members that joined there guild can pass leadership on and leave the game without having a guilty conscience.
I've seen numerous guilds now having to disband as the leader has stopped logging in and its a crap way of ending your time in settlers and this is the only game I've ever played where this happens.
Guilds are more than a building on someone's map as you know so please change the current system to allow us to pass them on.