Most likely what will happen is you'll get a letter from the Board, offering you to either enter their impaired nurses program (generally 3-5 year program) or, surrender your license immediately. If you enter their program, and complete all requirements (random urines, meetings, counseling, etc.) then there won't be any "black mark" on your license. I'm from MA so don't know the details of GA. But, I too was sober for a number of years (17) and diverted at work. I doubt that you'll be arrested because from what I hear, if that were to happen, it would have almost immediately happened following your diversion.