The US government publishes information, statistics and data across many disciplines and subject areas. There's no way that a google search can give one access to ALL government information as much of the publicly available information is available only in the deep Web -- in databases and repositories not indexed by google.
The Federal Depository Library Program (FDLP) is a network of over 1200 libraries (public, academic, state, law etc) that work with the US Government Printing Office to help their communities access the world of govt information. The links below are but a brief list of a few of our favorite govt resources. For more in-depth help, contact your local FDLP library and check out their research guides on government information. Contact freegovinfo AT gmail DOT com to add other resources.
General information and resources:
Research and reference assistance:
Legislative Branch (US Congress):
Science and Technology:
Transparency and govt watchdogs:
Freedom of Information Act (FOIA):