What notes are in the G major piano chord?
G major (G) is a major triad containing G, B and D. Its interval formula is root, major third and perfect fifth.
What are the inversions of G?
G has 3 positions: root position (G–B–D), first inversion (B–D–G) and second inversion (D–G–B). Each inversion contains the same chord tones but puts a different note in the bass.
These are reference note spellings in twelve-tone equal temperament, not fixed fingerings. See the keys, hear each voicing, or learn chord spelling.