How to make a gmod server run 24/7?

Server hosting is basically the only way, it can vary between host

It will be difficult if you do it through the computer, it is better through hosting

purchase a dedicated server, they dont cost too much

You can port forward a server and leave your pc on overnight. Or you can purchase a dedicated game hosting, then you can leave your server on as long as you want!

Most of these people seem to have hosted a 16 slot bad DarkRP server lol. Use a host that provides at least 1/gb of DDoS protection. Personally, I have used ELHostingServices for years and had multiple DDoS attempts but no crash. Even when having 80+ players on the server. Hope this helps.

These usually go with 3 types:
- Web Panel / low-tier (cheapest)
- VPS hosting services / mid-tier (cheap)
- Dedicated server hosting services / high-tier (veryies)

Or, you could set it up on your local computer by port-forwarding, requires a capable router and some knowledge. But, since you said you don't want to keep your computer turned on all day, your only option is to buy a server host.
There are many, just google it up

LinuxGSM is good for 24/7 if you have vps ) cya in the community

You need to either buy a server from a host (I recommend Nitrous Networks, they are rather cheap and offer good services) or buy a physical server yourself and set it up, both of which cost money.

Hello, try to search some company that will host it for you 24/7 . It is not worth timee and money for host it from your computer

You must have panel or linuxgsm and run it its really god for server and i prefer that method