Basics of the G Form on the Guitar
Like the C form, the G form barre chord is hard to play on the guitar and rarely, if ever, used in its entirety. Don’t worry about being able to play it perfectly because more often than not, you break it down into other, more manageable shapes. You use the G form to form major chords for notes along the 6th string.
Play the full G form arpeggio pattern shown here. It includes an additional note on the 2nd string. Play it as a scale.The additional chord tone on the 2nd string explains why you can play an open G chord with either the 2nd string open, B, or the 3rd fret of the 2nd string, D. Both notes are part of the chord.
Here is how to play G form chord voicings.
A features a part of the barre chord that’s used in the song Snow (Hey Oh) by Red Hot Chili Peppers as a B.
B shows the C/G used in the opening to Stairway to Heaven by Led Zeppelin.
C shows the F/A used in the opening to The Wind Cries Mary by Jimi Hendrix.
D is a very common, open position G/B. Variations of this shape are used in many acoustic guitar songs, such as Dust in the Wind by Kansas, Landslide by Fleetwood Mac, and Blackbird by The Beatles.
Other songs that make use of G form chord voicings include
China Grove by The Doobie Brothers
Fade to Black by Metallica
Gimme Three Steps by Lynyrd Skynyrd
Tears in Heaven by Eric Clapton
The G form has three notes in a row on strings 2–4 just like the A form. In fact, the two forms are connected by this group of notes. Now you see that this type of chord change can be viewed as a combination of the G form and C form too.