Version 2.7.4+reloaded3-5 of gosa is marked for autoremoval from testing on Sat 18 Aug 2018. It depends (transitively) on php-imagick, affected by #899805. You should try to prevent the removal by fixing these RC bugs.
Last update: 2018-07-22
Problems while searching for a new upstream version
uscan had problems while searching for a new upstream version:
In watchfile debian/watch, reading webpage
http://oss.gonicus.de/pub/gosa/ failed: 500 Can't connect to oss.gonicus.de:80