An unnamed two-seat convertible is due to appear in Grand Theft Auto VI, driven by Lucia during a high-speed chase through Port Gellhorn in the second trailer. It appears to be based on the 1990-1991 Buick Reatta convertible, judging by its full-width taillight, quarter windows and closely matching interior.
Vehicle data via GTA Wiki (Fandom), CC BY-SA 3.0.