Costeas-Geitonas School (CGS) is a private, co-educational day school located in the suburbs of Athens, Greece. Founded in 1977, CGS provides a holistic educational experience from Nursery to High School, with an emphasis on academic excellence, innovation, and character development. The school offers the International Baccalaureate (IB) Diploma Programme alongside the Greek National Curriculum, catering to both local and international students. With state-of-the-art facilities, a diverse range of extracurricular activities, and a commitment to fostering global citizenship, CGS aims to prepare students for success in a rapidly changing world. The school's experienced faculty and staff are dedicated to nurturing a supportive and challenging learning environment that encourages students to reach their full potential.