What are the notes in a G7 chord and how are they played on the guitar?

A G7 chord consists of the notes G, B, D, and F. On the guitar, a G7 chord is played by placing your fingers on the 3rd fret of the low E string (G note), the 2nd fret of the A string (B note), the 3rd fret of the B string (D note), and the 1st fret of the high E string (F note).