Gist has style files (*.gs) and palette files (*.gp),
typically installed in a subdirectory g where Python is installed,
and the user usually does not need to do anything else to access these files.
However, Zope users and others may require an extra setup step. For example,
because Zope's Python is installed in a non-standard location,
PyGist has problems finding these files. To solve this problem, set the
environment variable GISTPATH to the correct location of these files.