G-Golf License (GNU G-Golf Reference Manual)

GNU G-Golf is Free Software. GNU G-Golf is copyrighted, not public domain, and there are restrictions on its distribution or redistribution:

GNU G-Golf and supporting files are published under the terms of the GNU Lesser General Public License version 3 or later. See the file LICENSE.
This manual is published under the terms of the GNU Free Documentation License (see GNU Free Documentation License).

You must be aware there is no warranty whatsoever for GNU G-Golf. This is described in full in the license.