The 28-year-old model walked the Versace show with Vittoria Ceretti, 25, the current girlfriend of her ex-lover Leonardo DiCaprio, 48.
The mum to three-year-old Kai, with ex-boyfriend Zayn Malik, looked chic and comfortable in a black sweater and baggy olive green trousers.
A gold chain was visible around her neck, and she had her hair tied up in a bun.
She wore white Adidas sneakers with black stripes as she wheeled her mustard-colored suitcase and large Louis Vuitton duffel bag through the terminal.
The Next in Fashion presenter ran into Ceretti on the runway during the Versace show, which was also attended by Gigi’s 27-year-old friend Kendall Jenner.
Earlier this month, DailyMail.com reported that Leonardo had been dating Vittoria for at least two months after they were recently seen kissing in an Ibiza nightclub.
Sources close to the actor said he is “fascinated” by Vittoria, who at 25 is 23 years his junior.
They also say that the Italian model is called his “girlfriend.”
A few days ago, Gigi and the Oscar winner arrived in Milan on the same commercial airline flight.
She walked through the terminal about 10 to 15 minutes before The Wolf of Wall Street star did.
Gigi began dating the Titanic actor last year following his split from Daisy Jones and the 6 star Camila Morrone, 26, whom he dated for five years.
The almost 50-year-old actor has a long history of dating only women under 25 and has not changed his lifestyle in half a century.
The Romeo + Juliet actor was willing to make an exception to his age rule for Gigi, but she broke it soon after they met.
According to Us Weekly, Leo “really saw himself dating” the model.
“(Her) main priority is her baby,” a source told the publication. “(She) doesn’t want to seriously date someone until she can introduce them to her child.”
However, the former lovers “still communicate” with each other and remain on friendly terms.