The project for this script is being maintained as a Bazaar branch. The URL for the branch is http://www.russel.org.uk/Bazaar/Ant2Gant **, though if you want to browse the material rather than branch is you may well want to use the URL http://www.russel.org.uk:8080/Ant2Gant .
* The Subversion repository has definitely gone away. Actually it is still available but it is not being used.
** If you browse this URL in a broser it will appear empty as the branch has no working tree.