Advocates for grandparent try to get custody of grandchild
Thank you for your question. Try contacting Lone Star Legal Aid http://www.lonestarlegal.org to see if you qualify for their services to help with seeking custody. If not, they may be able to recommend someone in your area that can help you.
You can also take a look at http://texaslawhelp.org/issues/family-law-and-domestic-violence, specifically the Custody/Visitation section.