24.175.172.238
or
24.175.172.238:27015
I don't know how good my internet is seeing as I've never hosted a public server before. :|
EDIT: I'm using gm_construct_13. The when someone connects it's saying its so big to send or something. So you might have to download that map from the workshop first. Heres what it says:CreateFragmentsFromFile: 'maps/gm_construct_13.bsp' size exceeds net_maxfilesize limit (16 MB).