Watch the Major Family Chords online guitar lesson by Fareed Haque from Jazz Rock Workshop
Remember we are playing over a Gmaj7 sound. Convert to Em and then apply our "formula" building minor pentatonics on 1, 5 and 9, so Em, Bm and F#m are our pentatonic scales. The Em pentatonic is simply a G Major pentatonic used in country, bluegrass and western swing, and a lot of early Pat Metheny. I think they invented that scale in Kansas, eh Pat?