GCSE stands for General Certificate of Secondary Education. This is something that can be taken by people who would like to get academic qualifications for a certain subject. This is open to people who are aged 14 to 16 years old. Those who will get this are those who would like to get IB, which stands for International Baccalaureate.
This was founded in the year 1968, almost two decades before the GCSE was founded. The IB can be taken in three different regional centers wherein people can choose the type of skill level that they want to take. Take note that IB is open to people of different ages. People just need to choose the right category for their age group.