ged or high school diploma for cna?

I plan to start cna classes soon. My best friend wants to take them with me, but she doesnt have her ged or high school diploma. I know that the two schools I've got info from has told me that you do not need a ged or high school diploma to take the classes. I didnt ask them but I was wondering if that meant that she would also be able to become certified? and, or will It have an effect on her when trying to apply for a job. I know that most employers want you to have at-least a high shool diploma or ged. but I've heard of many cnas not having either. I was thinking that since cna is such a high demanding feild that It would be easy for her to get a job regardless! after-all she is a really great loving and caring person. and I'm sure she will make a great cna.