gvlogin.rb

require 'httpclient'

Google_Login    = 'googlename'
Google_Password = 'password'

PRE_LOGIN_URL   = "https://www.google.com/accounts/ServiceLogin"
LOGIN_URL       = "https://www.google.com/accounts/ServiceLoginAuth"
VOICE_HOME_URL  = "https://www.google.com/voice"

clnt = HTTPClient.new(:agent_name => "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2")
#clnt.debug_dev = STDERR

resp = clnt.get PRE_LOGIN_URL

clnt.cookie_manager.cookies.each {|x| @galx=x.value if x.name == 'GALX'} # fetch GALX

resp = clnt.post_content  LOGIN_URL,
                  :service  => 'grandcentral',
                  :continue => 'https://www.google.com/voice',
                  :Email    => Google_Login,
                  :Passwd   => Google_Password,
                  :GALX     => @galx