So a little back story, I had these same rim design on a 350z a while back but the rims were eventually stolen. These rims are discounted and hard to find so I’m going out my way to try different sizes.

The rims in question are GM bolt pattern so I’m guessing I’ll need and 5x4.75 to 5x114.3 adapter and they are a 20x10. Any input on how these might fit?

You may want to use a wheel calculator to put in your OEM size and the new size to see what the differences may be. Not enough detail here.

To know fitment, you'd need to include the wheel offset, taking into account the thickness of the spacer/adapter.