PeachCare is subset of Georgia Medicaid, but those on PeachCare aren't always "medicaid eligible" per se. The state decided a couple years ago that children of State of Georgia employee's would be enrolled under PeachCare through Georgia Medicaid as a cost saving effort while the parents are enrolled in whatever commercial carrier the state chooses to contract with for the plan year (Blue Cross, Aetna, whoever. I'm not sure who they are offered). The parents can be making well over the medicaid requirement for state assistance and wouldn't typically be eligible, but because they are state employee's their children roll under the Georgia Medicaid PeachCare umbrella. I don't think employees have the option to opt their children into the commercial carrier rather than PeachCare.
Doctors were up in arms about it when the state announced it because it impacted their revenue. Commercial carriers pay A LOT more than medicaid. Parents weren't thrilled either because they felt their services could be impacted as well as their provider network. It's true (especially in the Rome area!) the many doctors do not want to take Medicaid members.
I may have mangled this explanation a bit, so don't flame me if it isn't exactly right.