So, if the allegation is true, a public employee gave away government property without authorization. Doesn't matter to me if this was a radio, a vehicle, or a computer, any tangible property issued or in the control of a public employee belongs to the agency, and cannot be transferred, sold or traded without proper documentation.
The charges can range to theft by conversion (felony, due to the value), interference with governmental administration (felony), and violation of oath of office (another felony). But of course, this all depends on how the DA/ADA wants to prosecute. Hopefully the GBI will do the right thing and see this through the system by the book.
If true, than this chief should be "demoted to inmate" following all due process of law.