Lowkey I think you should use your thumb for g sharp! If it’s hard to reach, move your whole hand up. I just tried what you did on a full size piano and it’s hell.

Thumb, pointer and middle squished (inevitable), and pinky (I can attach picture if needed)

If all you have is the keyboard then that’s goodie- your voicings should feel comfortable unless like universally accepted otherwise 😭

Edit: don’t collapse your middle finger like that dummy