Playing this song on guitar is all about finding a Jack Johnson type of groove because you are grooving on one chord throughout an entire verse. This is basically just a 1-4-1-5 type of blues progression...theoretically very simple...but you gotta groove it.

God Said Sing (key of G, but I usually capo up 1 fret and play it in G)
by Colby Logan & Clifford Waite

G7
We've come to your town
G7
To sing this funky sound
G7
So bring your prayers around
G7
You know God's always down

C7
God said sing
C7                          G7
So wipe away your frown

G7
If you think there is a way
G7
To escape God's grace
G7
You musta never seen
G7
My man JC!

C7
God said sing
C7                                  G7
That's just how it's gotta be

                    D7                    C7
And may my lifesong be my offering
D7
God said sing
          C7                                        G7
And everybody knows that he's the king
(stomp, clap, huh!, wooow)
(stomp, clap, huh!, wooow)