GS meaning in Community ?

A primary school (in Ireland, the United Kingdom, Australia, New Zealand, and South Africa), junior school (in Australia), elementary school or grade school (in North America and the Philippines) is a school for primary education of children who are four to eleven years of age (and sometimes up to thirteen years of age). It typically comes after preschool and before secondary school.

The International Standard Classification of Education considers primary education as a single phase where programmes are typically designed to provide fundamental skills in reading, writing, and mathematics and to establish a solid foundation for learning. This is ISCED Level 1: Primary education or first stage of basic education.