I.M.
L.,
get as much information as possible to show the court. Get the phone records, and anything no matter how little it is, that can show how she doesn't even try to be there for him. Also, make sure you tell the judge that you want to request supervised visitations, or a third party visitations so the court can see that you are not trying to keep him from her. If you can get any paperwork to show how unfit she is, it will help you a lot. This is a long shut, but try and see if you can get any pictures of where she lives, and show the court how not ready she is to keep the boy with her. Remember you need to get as much as you can to prove that he is doing well, get all the papers that show he is going to therapy and that you are involved in his school. Papers that shows how well he is doing in school. Get a pediatrician to do an examination and give you a note of how well he is doing. Again, remember that you need to be prepared; take everything you can. You can also make the statement or bring something in writing of how she is not even involved in his school and activities. That you are and have been the only contact the school has for him.
Aside from this, and more than anything else I would tell you to pray!!! Pray for her, that she'll be willing to get help and that God sends her the help she needs. That your grandson be healed, and that you find favor with the judge and court system.
I'll keep you in my prayers.