Gigi Hadid, 24, was quick to cut Jake Paul, 23, down to size after he insulted her boyfriend Zayn Malik, 27, on Twitter, and friends say her swift response is “not a shock” to anyone that knows her. “Gigi is fiercely protective of her loved ones and she’s someone that always stands up to bullies,” a source close to the supermodel tells HollywoodLife EXCLUSIVELY, “so it’s not a shock that she went in on Jake.”