The owners of Gurney’s, a Montauk institution that has expanded in recent years under new ownership, plan to open their second location in the hamlet in May when a $13 million renovation of the former Montauk Yacht Club wraps up, Newsday reported. Developers George Filopoulos, of Metrovest Equities, and Lloyd Goldman, of BLDG Management, bought the site on Lake Montauk last year for $56.7 million. After that purchase, they set about renovating the lobby, ballroom, guest rooms, restaurants and meeting areas of what will be known as Gurney’s Star Island Resort & Marina. The resort will have 107 rooms, three pools, a kid’s club, a private beach and a 232-slip marina, which the owners also plan to upgrade. Filopoulos and Goldman bought the original Gurney’s from its longtime owners, the Monte family, in 2013. The developer duo fully renovated the facility, transforming it from a beachside destination for middle-class families to an upscale draw for affluent vacationers.