The number of pupils has been increasing steadily since the mid-1980s, especially since girls were admitted in the mid-1960s; today, the school educates over 700 students.

There are three ways to enter the Liechensteinisches Gymnasium from the Realschule (a type of secondary school offering a less theoretical education).

Courses in several subjects are only taught in certain grades: In order to meet the requirements to graduate with a Matura (school-leaving diploma), a student must successfully complete OS4, and must receive the mark of “sufficient" in at least two dissertations.

Written examinations are held in German, English or French, Mathematics, and a subject related to the student's specialisation.

Oral examinations are held in German, Philosophy, Religious Education, Ethics or History, Mathematics, Biology, Physics, Chemistry, Geography or Economics and Law, English, French, Italian, Spanish or Latin, and a subject chosen by the student.