What is GZ on tibia?

Question

I see that many are going to do "GZ"

I don't know if it's some kind of mission, quest, or place where they go hunting and can make money?

Answer 1

Gz, gtz or gratz is a way for you to congratulate someone who has achieved something (level, skill, achievement, valuable loot, etc.).

In short, it means congratulations!

Answer 2

Context here is very important, you are saying that people is in way do to an action, a congratulations is not an action that requires mentioned that, you only send it.

Also mentioned that a MANY are going to do that, so it's something that requires the world effort.

Taking that in count, it means, their are going to do/kill the boss Gaz'haragoth, its respawn every 15 days and you need a lot of players.