How to use Rails and Paperclip to store photos on Google Cloud Storage?

Ok, so I made it work this way:

Gemfile:

gem 'fog'

config/gce.yml:

development:
  provider: Google
  google_storage_access_key_id: XXX
  google_storage_secret_access_key: XXX

model:

  has_attached_file :avatar, 
                    :styles => { :big => "100x100#", :thumb => "25x25#" },
                    :storage => :fog,
                    :fog_credentials => "#{Rails.root}/config/gce.yml",
                    :fog_directory => "your bucket name",
                    :path => ":rails_root/public/users/:id/:style/:basename.:extension",
                    :url => "/users/:id/:style/:basename.:extension"