Presuming that the information is false, or that it is communicated for the purposes of harassment and intimidation, your first response should be to send your ex a demand in writing to cease and desist. It is a provision of most divorce settlements that the parties will live free from harassment and malicious behavior from one another. It is also part of the Standing Order issued in contested divorce matters is most Georgia counties. If your ex-wife's harassment continues after written...
You will need to get yourself appointed as administrator of your mother's estate through the probate court in the county where your mother resided at the time of her death. Once the probate court grants to you "Letters of Administration" you will have the authority to execute a deed transferring the property out of your mother's name. There's not enough info in your question to tell you conclusively if you would be the sole grantee on the deed.