Gbaug7 chord for piano with keyboard diagram.
Explanation: The Gbaug7 is a four-note chord. Gbaug7 can also be written as Gb+7, Gb7+ or Gb7#5. Notice that Gbaug7 are identical with Gb7+5.
Theory: The Gbaug7 is an augmented chord extended with a minor seventh.
Notes: Gb - Bb - D - E