Global Assessment Certificate
The Global Assessment Certificate program (also known as the GAC, /ʤiː eɪ siː/, jee-ay-see) is a university preparation and foundation studies program that provides students from mostly non-English-speaking backgrounds with academic knowledge and skills to prepare them for western-style postsecondary study. It is owned and developed by ACT Education Solutions, Ltd.
Source: Wikipedia — Global Assessment Certificate (CC BY-SA 4.0)