I'm trying to offer assistance to someone who did not finish secondary school (stopped at SS1)

At present full time school etc is not really accessible and I'm wondering if she obtains GED General Education Diploma. A qualification from USA which is considered as equivalent to finishing high school . Will she be able to sit for JAMB?

I have checked JAMB requirements and I'm not sure. Also not sure if having passed GED and JAMB will universities in Nigeria accept the applicant . I note a lot of them have extra requirements such as specific grades at GCSE or WAEC.

Any assistance greatly appreciated.