Server Troubles

I recently got GMod, and I can’t access any server on the game. I am connected to the internet, but no matches show up. Do I need to be friends with players that are in matches in order for that match to display? Thanks.

SPECS
E9950 Quad Core
4GB RAM
NVIDIA GTX 275
Windows 7

firewall perhaps?

It’s a possibility. I just disabled though, and still, no matches display.
It just says “Refreshing server list”.