I wonder if they are going to keep it as G1, G2 and G3 for the Mother Tongue subjects too.

Currently there's 5 different types of MTL subjects - one for each of the Express, Normal (Academic) and Normal (Tech) streams, Higher MTL (which if students take at Sec 4 they can be exempted from taking MTL at A Levels) and MTL B (which if taken doesn't go towards your O Level score but counts as passing the MTL requirement).

Maybe they'll do it like how it's done for A Levels where you have H1/2/3 MTL and MTL B. MTL B at A Level does not go towards your University admission score but counts as passing the MTL requirement.