How could i get my GED?

Im only 17 , & my mom kicked me out. She said im ner welcome there again , & her parent's (My grandparents) Lived on her land beside us , but shes making them leave for supporting me. So our only option is to move 60 miles away to my aunts house. but my mom refuses to withdraw me from school. She says she would rather me drop out. Im a senior & i only have 3 more months till graduation.. I wanna get my GED , but my school says i still hafta be withdrawn. I won't turn 18 until the summer , & im pregnant.. Is there anything i can do?!