The Gadd4 Guitar Chord is found in the G Major Scale: G A B C D E F# G. It is made up of the 1, 3, 4 and 5 of this scale. Meaning the notes G, B,C, and D.
This is a very easy chord to finger. If you know how to play the open G Major chord, then you are almost there. You are basically adding one more note to the G Major chord, the “C” note to be specific. This can be easily played by placing your first finger on the first fret of the B string, as indicated in the chord chart below.
Gadd4 Chord notes: G B C and D
You can see just how to finger this chord by referring to the diagram chart below.
Here is a key that will help you read the chart:
G Add 4 Video Demonstration