deploy.rb

require 'rubygems'
require 'bundler/setup'
require 'my_private_gem/deploy'

# Configure loudmouth
MyPrivateGem::Deploy.configure(:application1)

private_gem_deploy.rb

$: << File.expand_path('./lib', ENV['rvm_path'])   # Add RVM's lib directory to the load path.
require 'rvm/capistrano'                           # Load RVM's capistrano plugin.
require 'bundler/capistrano'

require 'my_private_gem/deploy/settings'
require 'my_private_gem/deploy/tasks'
require 'my_private_gem/deploy/hooks'
require 'my_private_gem/deploy/helpers'

module MyPrivateGem
  class Deploy
    class << self
      
      def configure app_name
        Capistrano::Configuration.instance(:must_exist).load do
          MyPrivateGem::Deploy::Settings.configure(self, app_name)
          MyPrivateGem::Deploy::Tasks.configure(self)
          MyPrivateGem::Deploy::Hooks.configure(self)
        end
      end
    end
  end
end