StGIS is a member of: St. Gilgen International School was founded in 2008 by the Austrian architect and entrepreneur Alexander Serda and since then has grown steadily to the current enrolment of 225.

After a short period of self managed administration proceedings in April 2016, and brief negotiations with the nearby energy drinks company Red Bull,[2] the school was taken over by the newly founded St. Gilgen International School Privatstiftung[3] on May 15, 2016, a non profit foundation which was founded by parents [4] and has since then been managed by the board members Gert Fahrnberger, Christian Dreyer and Andrea von Baumbach.

The school was built on a site beside Lake Wolfgang which previously contained green fields and some derelict villas.

The school is located in St. Gilgen on Lake Wolfgang 30 minutes' drive from Salzburg, Austria The school's campus is in a lakefront park with renovated historic and newly built academic and boarding facilities, in the centre of the village of St. Gilgen.

[citation needed] In addition to the academic programme, StGIS has a wide variety of outdoor and cultural activities as a part of the curriculum.

Outdoor activities include skiing, water sports (swimming and rowing), soccer, basketball, hiking, volleyball, tennis, golf, horse riding and yoga.

Throughout the academic year, the Arts Faculty take students on educational trips with a creative focus to museums and galleries in cities across Europe.