Ruby wrapper for the Google Places Autocomplete API.
Inside your Gemfile:
gem 'google_places_autocomplete'
Go here and activate it:
https://code.google.com/apis/console
>> client = GooglePlacesAutocomplete::Client.new(:api_key => 'your_api_key')
>> autocomplete = client.autocomplete(:input => "Paris", :types => "geocode")
>> autocomplete.predictions.first.description
=> "Paris, France"
Contact me if you have any suggestions and feel free to fork it!