Growing up, Gordon was best friends with Beanie Feldstein, her future Booksmart costar. Her, Feldstein, Ben Platt and eventually Platt's husband, actor Noah Galvin, formed their own unofficial Jewish-theater-kid group, as she told Vulture in March 2021.

At the New York City screening and after party for Gordon's new film, 'Oh, Hi!', the pair were spotted holding hands