 GED Testing permits adults, aged 18 and over, who have been out of school for more than one year, and not completed high school the opportunity to demonstrate that they have acquired the knowledge and skills associated with, and comparable to high school completion.To earn the GED Ontario High School Equivalency Certificate a candidate must complete a series of tests covering mathematics, science, reading, writing and critical thinking skills.The Independent Learning Centre administers GED Testing at locations around Ontario.