There are many pieces to the GNO documentation. The primary ones are listed below. They are available at the GNO Documentation Page and via anonymous ftp from ftp.gno.org.
If you are new to GNO, you should start with the Overview and Installation Manual (this document).
The GNO Shell User's Manual provides information on using gsh, which is an ORCA-compatible shell. It is the primary user interface to GNO.
The Kernel Reference Manual gives detailed information about the kernel, which is the heart of GNO. It is intended mainly for programmers.
The ``Manual Pages'' are the traditional form of UNIX documentation. They are normally viewed on your GS by typing ``man subject'', where subject is the name of the command, library routine, file (and so forth) for which you are trying to obtain information. Man pages are provided for the base distribution, and are usually provided by authors of third-party programs. Type ``man man'' from within GNO for detailed instructions on how to use the man pages.
The FAQ is a list of questions and answers that have come up many times; you should read the FAQ before posting any GNO questions to Delphi or comp.sys.apple2.gno. Your question may already be answered.
More information, including an online GNO bugs database, status charts for ongoing development, and GNO-related links are available online at http://www.gno.org/ gno'. Because of the nature of this information, much of it is available only via the WWW, and not anonymous ftp.