How do you make The Garrysmod Motd Direct to a webpage

Hello im not sure if i am posting on the right area but i apologize for doing so
anyway my question is somtimes when i go onto some gmod servers there motd is replaced by a webpage with a list of rules on them the only problem is im not sure how to do this any advice at all would be great thanks

The MOTD is pretty much a web page anyway.
You could be lazy and add a frame with the source of a URL or edit the Lua to direct the MOTD.