As per the Resolution of the Education Ministers' Conference (KMK), GSIS is authorised to award the German International Abitur at the end of Class 12, the Realschule leaving certificate at the end of Class 10 and the Hauptschule leaving certificate at the end of Class 9.

In terms of providing proof of eligibility for admission to universities in Germany, Abitur certificates earned at GSIS are equivalent to Abitur certificates earned in Germany. They are also recognised by universities in Switzerland and Austria, potentially with certain restrictions.

The Abitur is internationally respected and provides access to British and American universities.