Please talk to your child's class teacher first and let them inform you about the funding opportunities at the school.
Offers for students with special talents can be found at:
https://www.schulportal-thueringen.de/begabungsfoerderung
Counseling for students with special talents can be found at: http://talentschub.de/informationen/beratungsangebote-zur-hochbegabung/
Parents can also contact the School Psychology Service: https://www.thueringen.de/th2/tmbjs/bildung/einrichtungen/schulpsychologischer_dienst/