GSIS consists of an elementary school (Pre-K - 5th grade), a middle school (6th-8th grade), and a high school (9th-12th grade). The student body at GSIS is diverse with dozens of countries represented. The exit goal for graduates is to prepare them for "world class" higher education institutions internationally. Because the language of social interaction and instruction on the GSIS campus is English, it is assumed that most graduates will matriculate to higher education programs where English is the language of instruction.
According to Korean law, students must be children of foreigners, or if the students are Korean citizens they must have lived outside of the country for at least three or more years to be eligible to apply to GSIS. Additionally, students will be admitted on the basis of their placement tests results, past three years’ academic record, English language ability, discipline and medical records. When applying to GSIS, each student will need to submit the following items on the check list. Families should apply early and communicate with GSIS as soon as possible to answer any questions and to complete the application process.
Non-English speakers or limited English proficient students are admitted to the GSIS ESL program based on the availability of classroom space within the program, English ability, student's age, past grades, and the potential for success at the international school. As a general rule, GSIS will not accept more than 30% of its current enrollment as ELL students needing academic assistance. Beginning ELL students are not accepted after 7th grade except as a limited term exchange student.