While numerous other states have already done the same thing (and several more are in the process of doing so as well), Georgia's move to their own enrollment platform was especially noteworthy for two reasons:
First, because it represents as complete 180-degree turn from their prior attempts (over the course of several years) to eliminate any formal ACA exchange (federal or state-based) in favor of outsourcing it to private insurance carriers & 3rd-party web brokers.
They also estimate that another 1.8 million uninsured Americans who are eligible for subsidized ACA exchange plans who would be eligible for Medicaid instead if those state actually did expand Medicaid (and perhaps another 100K in Missouri). That's nearly 4.0 million total...
So, how to crack this nut in these holdout states, all of which are either completely or partially controlled by Republicans who have adamantly refused to expand the program no matter what all these years?
As I (and others) have written many times, closing the so-called "Medicaid Gap" is one of the trickiest challenges President Biden and Congressional Democrats face when it comes to strengthening and improving the Affordable Care Act.
Once again: Under the ACA, all Americans earning up to 138% of the Federal Poverty Level (FPL)... roughly $17,700/year for a single adult or around $36,500 for a family of four...were supposed to be eligible to join Medicaid regardless of their health status, whether they had kids and so forth.
This was supposed to be the case in all 50 states and the District of Columbia (I'm not sure about Puerto Rico or the other U.S. territories...many ACA provisions never applied to them in the first place).
Unfortunately, one of the major consequences of the NFIB vs. Sebelius Supreme Court Case in 2012 was that expansion of the Medicaid program has to be voluntary on the part of each state.