Compared to the 5 Series GT prototype spotted in November 2015, this latest unit wears pretty much the same amount of camouflage, although it is now fitted with production-ready headlamp and tail-light units.
Up front, the 5 Series GT features the company's familiar double kidney grille and angel eye headlight design. At the rear, the GT comes with tail-lamp mouldings that have a new sculpted 3D effect.
As with the current 5 Series GT, the new model features a liftback tailgate, a taller body than other 5 Series models, and unique body panels.
Design-wise, the second-generation 5 Series GT is, unsurprisingly, styled similarly to the rest of the next-generation 5 Series lineup, which spy photographers have already spotted in sedan, wagon, M5 sedan and wagon, and Alpina B5 Touring forms.
The GT will sport an evolutionary interior that, aside from some minor details, looks to be the same as the ones used in other 5 Series models.
Based on the company's latest flexible architecture, which employs high-strength steel, aluminium, and carbon-fibre, the new 5 Series range is expected to shed around 100 kilograms compared to today's cars.
Under the bonnet, the 5 Series GT will likely employ a selection of turbocharged three-, four- and six-cylinder petrol and diesel engines.
The first models in the next-generation 5 Series range are likely to debut later this year, but the GT's official unveiling will probably take place in 2017.