First of all "Aleta sio" is the spell used to edit the guess list from a house or guild house.
Once you use that spell, a list will appear and you can write the names from the players invited to enter that house.
There are some syntaxes that can be used on that list to invite groups of people, in the specific case to invite all the guild members from a Guild you must use:
*@GUILDNAME
You could also invite just some specific ranks from the guild with the syntax:
RANK*@GUILDNAME
Just to add some information, you could just set an asterisk * on the guest list so EVERY PLAYER from the server can enter to the house.
There's also a syntax to exclude specific players even if there are other syntaxes that could include them, by example if you want to exclude an specific player from your guild you must use the syntax:
!PLAYERNAME
The words with caps have to be replaced by the guild name from the guild you want to invite, the correct rank from the guild or the correct player name you want to invite or exclude.