[Reference] What kind of avionics are used in each aircraft

They are G3X Touches. There are only three Garmins modeled in the stock sim, which Working Title is improving: G1000, G3000 (imitating a G5000 by having PIC/COP PFD GTCs - in essence a G3000 with two extra GTCs) and G3X Touch. You can split the screens on the King Air just like the XCub.