Problem
Using the latest version of Geokit gives the error for undefined method ‘timeout’. This could happen if the gem/plugin didn’t modify the config/environment.rb file, and you had to copy the configuration values from an older version.

Solution
The configuration variable has changed in the latest version (1.5.0) from timeout to request_timeout, so change it in your config/environment.rb file as :
GeoKit::Geocoders::request_timeout = 3