Is this even possible?

I was reading this http://www.garrysmod.com/?dont_buff_my_pylon=1671&GMod_Tower_Released and then i saw this “Lua Connected Servers
The tower is the base server. Each gamemode will be on its own server. You have to join the base server in order to access the gamemode servers.”

what does this mean? we can have a server as a “lobby” and then use that server to connect to the server with game mode i want? if this is really a lua script, want it soo badly

it’s not open for distribution.

You are correct in the sense that it is sort of a lobby.

Most likely, you will have no need for this function, if you plan to play singleplayer.

there is a clan that has some kind of server switcher thing, i would type in “!rulez” and a menu would pop up and i would pick a server i want, what addon is that

They probably made it themselves.