Henry County is one of the Georgia counties in which the magistrate courts handle criminal arrest warrants and determinations of probable cause, so what I said above is most likely what happened.
As I said in my previous response, even if she now recants, the DA can use her previous statement not only to impeach her credibility but also to prove the truth of what she previously said (that is, that you made the threat to kill her).
Georgia Code section 16-11-37 defines a terroristic threat under Georgia law as follows:
(a) A person commits the offense of a terroristic threat when he or she threatens to commit any crime of violence, to release any hazardous substance ... or to burn or damage property with the purpose of terrorizing another or of causing the evacuation of a building, place of assembly, or facility of public transportation or otherwise causing serious public inconvenience or in reckless disregard of the risk of causing such terror or inconvenience. No person shall be convicted under this subsection on the uncorroborated testimony of the party to whom the threat is communicated.
Therefore, the statement "I hope you die" would not be a terroristic threat.
More significantly, I see that there is an exception to the usual rule regarding the sufficiency of evidence which applies in the case of a terroristic threat. That is, the provision that you cannot be convicted on the uncorroborated testimony of your girlfriend. So, if you are correct that there is no other evidence that you made this threat (no one else heard you and it was not put in writing), you cannot be convicted of this crime on the basis of your girlfriend's testimony alone.
Do you have an attorney representing you in this case? If not, you should consider consulting with one or, when you appear in superior court, asking for the public defender.
Your girlfriend could be in trouble if she changes her statement now, as the police could charge her with filing a false police report
. However, it is rare for such situations to actually result in criminal charges against the original complaining witness.