Hai guys!
So, server list in GMod is… fu*ked up. Sometimes your server “magically” disappears, list sorts server by the nearest (its also bad, ill explain that later).
So here`s my suggestion
On first server list opening, force user to choose country in what he wants to play. Server owners will have to set country name in config. Now, player chose Japan and he lives in Great Britan, so first servers that appear are Japan servers. Many people buy dedicated servers, VPS in foreign companies such as OVH.