(a) Except as provided in subsection (b) of this Code section, this article shall supersede conflicting tort, restitutionary, and other laws of this state providing civil remedies for misappropriation of a trade secret.

(b) This article shall not affect:

(1) Contractual duties or remedies, whether or not based upon misappropriation of a trade secret; provided, however, that a contractual duty to maintain a trade secret or limit use of a trade secret shall not be deemed void or unenforceable solely for lack of a durational or geographical limitation on the duty;

(2) Other civil remedies that are not based upon misappropriation of a trade secret; or

(3) The definition of a trade secret contained in Code Section 16-8-13, pertaining to criminal offenses involving theft of a trade secret or criminal remedies, whether or not based upon misappropriation of a trade secret.