What a stupid thing to say.
Jimi Hendrix - Fender
Eddie Van Halen - Modified Fender
Keith Richards - Fender
Rory Gallagher - Fender
Chuck Berry - Gibson
BB King - Gibson
Eric Clapton - Fender
Johnny Marr - Rickenbacker/Fender
John McGeoch - Yamaha
The only guitarist of note I can think of that uses a Gretsch is Brian Setzer.