He could play as an inside forward, similar to Pjaca while Dybala would play false 9. Gabigol is a leftie so he'd thrive as a RW cutting inside.
That way we'd line up 433 with inside forwards:
Pjaca - Dybala - Gabriel
x - x - x
x - x - x - x
x
I don't see Higuain as a false 9, so...