This function returns a guild's name given an ID number. If there is no such
guild, "null" will be returned;

// Would print what ever guild 10007 is, in my case this would return "AlcoROhics"
mes "The guild "+GetGuildName(10007)+" are all nice people.";

// This will do the same as above:
set @var,10007;
mes "We have some friends in "+GetGuildName(@var)+", you know.";

This is used all over the WoE controlling scripts. You could also use it for a
guild-based event.