G3 is an almost annual live music show and concert tour featuring three select guitarists of the generation; hence its name. It was created by guitarist Joe Satriani in 1996. Since its inception G3 has featured many guitarists including: Steve Vai, Eric Johnson, Kenny Wayne Shepherd,Yngwie Malmsteen, John Petrucci, Robert Fripp, Paul Gilbert, Uli Jon Roth, Michael Schenker, Adrian Legg and many other special guests, including Tony MacAlpine, Johnny Hiland, Steve Lukather, Steve Morse, Chris Duarte, Andy Timmons, Neal Schon, Gary Hoey, Brian May,Billy Gibbons, Johnny A, George Lynch, Patrick Rondat, Michel Cusson, Alejandro Silva (Only in Chile) and Eric Sardinas.

en.wikipedia.org/wiki/G3_(tour)