A proponent of the Georgia law would most likely have argued that it would uphold the Thirteenth Amendment.
make blacks and whites “separate but equal.”
end racial prejudice in the United States.
uphold the voting rights of African Americans

make blacks and whites “separate but equal.”

Explanation:

A proponent of the Georgia law would most likely have argued that it would make blacks and whites “separate but equal.”

Plessy v. Ferguson was a high profile case in the Supreme Court in 1896 after it was ruled that the separate but equal doctrine was Constitutional. This happened after a black man Homer Plessy refused to sit in a car that was "made for blacks".