Nginx to distribute load between two servers

Hello,

I thought this would be possible with GeoIp but now I'm not so sure, so any clarification would be much appreciated.

I have servers in two different geographic areas and I would like to redirect visitors to their closest server to reduce page load times. Would this be possible with GeoIp rules?

Example: all visitors from a list of countries in Europe go to SERVER1, all visitors from countries in America to SERVER2, etc.