Open shape
320002
Gmaj7 is the G major 7 chord. Its notes are G, B, D and F♯. An open, reflective color. The major seventh sits a semitone below the root.
320002
354433
x-10-12-11-12-10
Numbers show frets from the low E string to the high e string; x means don't play that string.
Gmaj7 is the Imaj7 chord in G major and the IVmaj7 chord in D major. That makes it a natural fit in songs written in those keys.
Every G, B, D and F♯ on the first 12 frets. The filled dots are the root, G. Build your own shape from any nearby group.
Other G chords
Other major 7 chords