Can you create a garrys mod server for free

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]^