Schmidt Peterson Motorsports will test the Italian next month at Sebring.
The battle between Felipe Nasr and Stoffel Vandoorne for second place in the Drivers’ standings comes to an end.
GP3 team Status Grand Prix have signed an agreement to acquire Caterham Racing.
Palmer secured the GP2 drivers' title in the penultimate round at Sochi, Russia in October.
The legendary venue is the quickest and one of the most atmospheric venues on the calendar.
The Englishman still has a comfortable lead in the drivers' championship
43 and 18 points represent the lead that the British driver and the Sarthe-based team have over their rivals as the GP2 season takes its summer break.
The new Marussia F1 Team reserve driver Alexander Rossi take up a seat with Campos Racing, in place of Kimiya Sato for the last weekend.