How can I go about getting my nephew from his grama who has power of attorney over him. His mom lost him thru cps. And gramas health is getting bad.

If you have temporary orders through the court, were they ever finalized? If not, the case may have been dismissed without final orders being in place. Also, if you gave up possession of the child, you may have to file suit to request possession. On the other hand, the grandmother may make an agreement for you to take the child back. How old is the child?