Nashville Number System — Key of Gb
The complete NNS chart for Gb Major: all seven diatonic chords with Nashville numbers and Roman numerals.
Key
Nashville Number Chart — Key of Gb
| Degree | Nashville | Chord |
|---|---|---|
| 1 | 1 | Gb |
| 2 | 2m | Abm |
| 3 | 3m | Bbm |
| 4 | 4 | Cb |
| 5 | 5 | Db |
| 6 | 6m | Ebm |
| 7 | 7dim | Fdim |
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Non-diatonic chords are preserved unchanged.
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Nashville Numbers in the Key of Gb Major
In the key of Gb Major, the seven diatonic chords are Gb, Abm, Bbm, Cb, Db, Ebm, Fdim. In Nashville Number System notation, these chords are numbered by their scale degree: the tonic chord Gb is 1, the subdominant Cb is 4, and the dominant Db is 5. Minor chords use a lowercase “m” suffix — Abm is 2m, Bbm is 3m, and Ebm is 6m. The diminished seventh degree, Fdim, is written 7dim.
NNS Reference Chart — Gb Major
Common Progressions in Gb Major — NNS Notation
The most common chord progression in Gb Major is I–V–vi–IV — Gb, Db, Ebm, Cb — written in Nashville notation as 1–5–6m–4. Because the NNS uses numbers rather than chord names, this chart works verbatim in any key — a band calling out “1, 5, 6m, 4” knows exactly what to play regardless of the root key. Cross-reference with our chords in the key of Gb Major for the full diatonic chord set with Roman numeral analysis.
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