There are a number of options for getting in contact with responsible people for Gooper.de.
Post a notice
If you have a question about how to do something, just post a notice with your question. People here like to answer messages. Watch the public timeline for answers; they'll usually start with "@" plus your user name.
Bugs
If you think you've found a bug in the Laconica software, or if there's a new feature you'd like to see, add it into the Laconica bug database. Don't forget to check the list of existing bugs to make sure it hasn't already been reported!
You can reach the responsible party for this server at
Gooper.de is a microblogging service. It runs the Laconica microblogging software, version 0.5.0, available under the GNU Affero General Public License.