Dear @Singh,
Welcome back to the Wefugees Community and thank you for your question.
A "Gutachten" is a scientific report in which an expert is giving his/her judgement or verdict on, for instance, a disputed issue. You often find these types of reports in the fields of medicine or psychology - but not exclusively. In order to be able to give you specific information, we may need some more details on the context.
Looking forward to hear from you again.
All the best,
Meike