Hard G in GIF as in Graphics (which is what it stands for), Soft G in GPT as in Generative (which is what it stands for)... Simple. You might get away with "G

Hard G in GIF as in Graphics (which is what it stands for), Soft G in GPT as in Generative (which is what it stands for)... Simple. You might get away with "Gippity" in some contexts.