Windows installer: GNU GPL is not an EULA
Gajim installation wizard asks users to agree with the GNU GPL license, even though they do not have to in order to use Gajim.
Put a title says GNU General Public Notice, and provide a hyperlink to the license, similarly to how some big business companies do.
Here is an example of one:
''This product includes software code developed by third parties, including software code subject to the GNU General Public License ("GPL").
''The GPL Code used in this product is distributed WITHOUT ANY WARRANTY and is subject to the copyrights of one or more authors.
''Please refer to the following GNU General Public License for further information.
Between the first and second paragraphs there is information on how to obtain the source code by shipping and the next paragraph to follow is about obtaining sources from manufacturer website.