insideschools.org/high/browse/school/109
Please look immediately into Manhattan Comprehensive Night and Day School. This school accepts older students and they graduate with a regular high school diploma. They have AP classes and other advanced classes. And also foundation support.
If your daughter is serious about graduating with a non-GED diploma, this place has a reputation of being very supportive. They have a website, and you can access it via the Inside School's review.
Good luck!