the answer i think is yes, it may be a bit laggy depending on your area but my friend has a gmod server that he got for free by forwarding his ports, and if you dont have a router then you dont need to do anything apart from click "create multiplayer" i hope you find that answers your question you can add me to your steam friends if u like my name is ^[BPF]ISPYUDIE[BMA]^
It varies from server to server.
Port forward your router. Find out more at www.srcds.com
own a server or ask the owner to make you admin
gmod is 10$ at garrysmod.com
You can get Garry's Mod 9 for free, yes. But Garry's Mod 10, (11), you have to pay for. But Garry's Mod 10 is really worth it, in my opinion.
Buy Garry's mod 10 off of steam.
i want to play garrys mod no downloading and no buying
technically yes, there were a few updates it is still called Garrys mod 10 though
Garry's Mod 10
Go to www.garrysmod.org and download the latest version of DarkRP.
for that you probably will have to buy?/rent a server. you can get one at the related links below.
gmod 9, yes gmod 10-no