Fig. 1: G Pentatonic
Fig. 2: C Pentatonic
Holy cow, it really shares a lot of notes with the G pentatonic. Just change your B note in the G pentatonic to a C note and you magically have the C pentatonic.
Fig. 3: Fun Rolling The Open Strings
Fig. 4: G And C Working Together
Fig. 5: G Or C Pentatonic: You Can’t Go Wrong
The notes from these two scales are completely interchangeable when play over G or C chords.
In the exercise below, hold each chord the entire measure while adding the notes from the scales. The C note added with the C chord will also fit in over a G chord and as will a G note with a C chord. Remember that C is the 4th scale step in the G major scale- and G is the 5th scale step in the C major scale and is in the actual C chord. While we’re at it, the B in the G pentatonic is the 7th step in the C major scale, so the B note will work in C as well.
Once you can play this exercise as written try to switch the chords, but keeping the scale pattern. For example: play the C chord, then the G pentatonic, then the G chord, and finally the C pentatonic.
