With the introduction of 6-3-3-4 system of education in Nigeria, students are required to enter secondary school after spending a minimum of six years of Primary Education and passed a prescribed National Common Entrance Examination.
The General Certificate of Education Examination (GCE) was replaced by the Senior Secondary Certificate Examination (SSCE). The SSCE is conducted at the end of the Secondary School studies in May/June. The GCE is conducted in October/November as a supplement for those students who did not get the required credits from their SSCE results.
Meaning the two exams have the same standard.