Nimbus
The Buckingham Nimbus is an airplane that appears in GTA 6.
This private jet made its debut appearance in GTA Online, where it arrived as part of the Further Adventures in Finance and Felony update in June 2016.
It has never been featured in a single-player Grand Theft Auto experience, but was confirmed to come to Rockstar's latest title alongside the release of Trailer 1.
In the game's debut trailer, the Nimbus can be seen flying in the air above 
The Nimbus is an extremely fast jet plane, though its acceleration and air braking aren't quite so impressive. Once it reaches its full speed, few planes can compete with it.
The Buckingham Nimus appears to be primarily based on the real Cessna Citation X, an aircraft known for being one of the world's fastest private jets.
