Chord sequence

G7, C7, G7, C7, G7, Am7, D7, G7, D7

G7 C7 G7 C7 G7 Am7 D7 G7 D7

Tempo 120 BPM

Rootless Shells Guide tones Rooted shells Rooted Drop 2

Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.

Customize each chord

G7
C7
G7
C7
G7
Am7
D7
G7
D7

Analysis

Heard in G major

Each chord's roman numeral and role in G major
Chord	Numeral	Role
G7	V7/IV	Secondary dominant of IV
C7	IV7	Blues dominant
G7	V7/IV	Secondary dominant of IV
C7	IV7	Blues dominant
G7	I7	Blues dominant
Am7	ii7	Subdominant
D7	V7	Dominant
G7	I7	Blues dominant
D7	V7	Dominant

Progressions in these changes

All the chords

Blues with ii-V in G

The basic blues with a ii-V in bars 9 and 10 in place of V-IV, and a V7 turnaround in the last bar.
Chords 6 to 7

Major ii-V Progression in G

Am7 D7

Scales to play