I agree with Casey, you need a better attorney. And yes, you need representation in BOTH Georgia and Colorado.
Check the member listing for the American Academy of Adoption Attorneys at
www.adoptionattorneys.com. Call several members and ask for their experience with situations like yours, fees, etc.
Unless you can finalize at placement, which you cannot in GA, you absolutely must go through ICPC. This is regardless of which state you plan to finalize in. We were VA residents, son born in TX (one of the few states that allows non-residents to finalize in their state). We decided to finalize in TX. We STILL had to go through ICPC so that both VA and TX knew where our son was, that we would have post-placement supervision, etc.
As far as GA, I don't think they allow non-residents to finalize in their state as most states require that you be a legal resident before you can finalize there.
And yes, they have to at least notify, and he can then either choose to terminate, contest, or disappear. If he does not appear or respond to notice, they can then involuntarily terminate his rights. This is not automatic and they must notify at his last known address. Publication alone where biological father is known does not suffice.
HTH, best of luck.
Regina