Gomes is definitely not a treq. Even less of one than Pjanic.
And Kovacic isn't really a treq either.
Unless we're looking at someone not mentioned as a target so far, if we want to play 4-3-1-2 we're going to be converting a midfielder to play CAM, like we did with Vidal and Pereyra.
If we got Pjanic + Kovacic/Gomes, I could Allegri experimenting with Pogba playing as a CAM, allowing him to focus on attack, and maximizing his massive talents going forward. Especially if we get Gomes who a Pogba style player, only much more defensive-minded.