Will Republicans start allocating Georgia electoral votes by Congressional district?

[Schiff for Senate]

No, because GA could still very plausibly vote red, and it would backfire massively. Because despite the insistence of users on Talk Elections, GA is still very much a swing state and not a blue one that could go red. It voted blue in 2020 by 0.24%, and there are enough suburbanite moderate Romney/Biden voters who might return to the GOP if Trump isn't the nominee, and there might easily be enough to flip the state back (albeit narrowly), despite demographic changes. Of course, in the long term GA will become bluer, but for now (and for 2024) it will be blue.

 If passing those kinds of laws is what the GOP wants to do, they should do it in states like MI and PA, where even if they lose the state (which is pretty likely for 2024), they get a good number of electoral votes they'd be otherwise deprived of.

 The task is for them to find a state which is blue enough at a presidential level where they can implement this law, and successfully. In GA, it could very easily be counterintuive.

 Of course, the GOP can pass this law in GA in some years, when GA is bluer - but the problem with that is Democrats might control the legilsature by then, which can be remedied by Georgia Republicans pulling a massive and agressive gerrymander to maintain their majority and implement this law at the right time, when GA is blue - which is currently not the case.

[Schiff for Senate]

and there are enough suburbanite moderate Romney/Biden voters who might return to the GOP if Trump isn't the nominee,

LOL