I want to add the same logic to 13 different questions with doing it 13 times!
Unfortunately this is not possible.
The logic conditions for each question are different and reflect all of the other questions that precede it. So it is not possible to mass generate logic conditions.
However, if the logic condition that you want to implement is triggered by a single question, you could use page logic – all of the questions on a page would be controlled by a logic condition attached to the page. See the SurveyGizmo documentation for details – http://help.surveygizmo.com/help/article/link/setup-page-logic