Easiest and most popular way would be to use ULX Adverts. Basically, you have a menu in-game where you can create, edit and delete messages with in-depth customisation.
ULX & Ulib:http://ulyssesmod.net/downloads.php
Garry's Mod
GMOD DARK RP SERVER CHAT
Submitted by mikehawk, 15-11-2017, 02:50 AM, Thread ID: 60495
Thread Closed
RE: GMOD DARK RP SERVER CHAT 15-11-2017, 03:45 AM #2
15-11-2017, 03:45 AM
#2