Complex sentence: They settled on "G6", meant to be a hyperbolic reference to the private airplane model Gulfstream IV, referred to as a "G4", which had been name-checked in songs such as Drake's 2009 "Forever".
Split into simpler sentences: They settled on "G6", meant to be a hyperbolic reference to the private airplane model Gulfstream IV, referred to as a "G4". The G4 had been name-checked in songs such as Drake's 2009 "Forever".