The ISG is a part of a Dutch secondary school called the "Maartens College".
The main building of the ISG is called the Esserberg.
The Maartens College follows the basic Dutch programs (VMBO, HAVO, VWO) and also has a programme called TTO (Twee Talig Onderwijs), translated as bilingual education, which is taught in Dutch and English.
TTO is conducted in a similar way to the MYP system that the ISG uses.
Many different nationalities are represented in this school; England, America, Denmark, South Africa, Germany, Poland, France, Canada, Czech Republic, Malaysia, etc.