No matter what is the official name, but this really blew me up. The gOS or Google OS or Green OS is a linux (Ubuntu 7.10) based OS release filled with all free Google application. The OS is a new OS that makes it easy to use Google applications and other free software. With long list of free Google application such as Gmail, Gtalk, Calendar, Maps, Docs and Spreadsheets, they came out with idea that Google is our OS. It’s still in alpha stage tough, rumoured to be realeased in 2010.

For more information, check out these links:
gOS blog

Goobuntu wiki

gOS website