Redirecting users to sub-sites based on their country IP

I have a WP Multisite and I would like to route users to sub-sites based on their county IP. For instance, USA users would be sent to usa.domain.com. I have looked into various ways to do this and most people say you can do it will MaxMind's Geo IP. (http://www.maxmind.com/en/geolocation_landing). Unfortunately the site I am working on is hosted on GoDaddy so I'm am not sure if they allow that service/module on their servers.

Can you suggest any alternative solutions to my problem?