STANDARD TUNING
CAPO ON 3

You can play G and C with:
  G C          G 
E-3-3        E-3-0
B-3-5        B-3-1
G-4-5   or   G-0-0
D-5-5        D-0-2
A-5-3        A-2-3
E-3-3        E-3-0