The Ghawar is a private jet in The Ballad of Gay Tony. The plane is never accessible or flyable in-game.
The single-engine design is unusual for business jets, which mostly have dual (and sometimes triple) engines for performance and reliability - such as the Shamal. While not used on large busines jets, the Ghawar's engine configuration is similar to that being used on the new Very Light Jet, the PiperJet.
Ray Bulgarin's Ghawar
In the mission Departure Time, Ray Bulgarin attempts to flee Liberty City in his blue Ghawar whilst Luis Lopez was destroying his heroin shipment in Funland. Timur was left behind and killed by Luis at Funland, who then went after the jet with Yusuf Amir's help. Ray was executed by Luis onboard the jet, causing a live grenade Ray was holding to detonate, tearing off the cockpit. Luis manages to escape to safety whilst the jet plunged into the sea.
The interior of the plane is only seen during Departure Time; it is small and has many chairs on each side of the plane, the cockpit can be seen if the player looks closely when Ray emerges with a grenade. The windows are indestructable, and unlike the interior of the Andromada in Stowaway, the plane will not explode when fired inside, but this probably because there is not exploive barrels or propane tanks on the plane.