At risk of having no idea what I'm talking about, they helpfully quote the Georgia Codes to which they are referring, and the only one that looks like it actually applies might be the first, Criminal Trespass (GA Code § 16-7-21), depending on one's definition of "maliciously".

"A person commits the offense of criminal trespass when he or she intentionally damages any property of another without consent of that other person and the damage thereto is $500.00 or less or knowingly and maliciously interferes with the possession or use of the property of another person without consent of that person."

That sentence isn't the best, but I think it could be argued that it can be parsed as:

"A person commits the offense of criminal trespass when he or she <does this thing> or knowingly and maliciously interferes with the possession or use of the property of another person without consent of that person"

Unlocking it is arguably interfering with the use of the property of another person without consent; but is it malicious? Can't find a clear definition of "malicious" in Georgia law. I guess this is why lawyers get paid so much.