You will need to consult local real estate counsel for the list of documents necessary to file a deed.
As to the type of deed, as the grantee you always prefer a warranty deed over a quitclaim deed.
Although there may be no liens on the property that you are aware of, it is always advisable to performa title and judgment search to see if your brother has any issues that might affect the property.
I am not a GA attorney, laws vary from state to state, therefore you should always consult a local attorney.
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Based on the information you provided, the Quitclaim Deed should work.
[This communication is intended as general information and not specific legal advice, and this communication does not create an attorney-client relationship.]