You searched for gatemsg
1. custom gatemsg
Syntax: custom gate entry (<message>)
custom gate exit (<gate message>)
custom gate <entry/exit> none ‑ to clear a message
With this command, you can customize what other players see when you enter
or leave a room via a gate spell. This feature requires a customization
token.
Once you set a message, you have 5 minutes grace period to update it for
free.