Gbm7

 ======
 ||||||
 ------
 1-11-1  2nd fret
 ------
 ||||||
 ------
 |2||||
 ------
 ||||4|
 ------
 ||||||
 ------
 GDFBFG 
 bbbbbb
    b

or:

 ======
 ||||||
 ------
 1-1111  2nd fret
 ------
 ||||||
 ------
 |3||||
 ------
 ||||||
 ------
 ||||||
 ------
 GDFBDG 
 bbbbbb
    b

or:

 XX
 ======
 ~~~~~~
 ------
 ||1|||  4th fret
 ------
 ||||23
 ------
 |||4||
 ------
 ||||||
 ------
   GDFB
   bbbb
      b

or:

 X
 ======
 ~~~~~~
 ------
 ||1-1|  7th fret
 ------
 |2|3|4
 ------
 ||||||
 ------
  GBFGD
  bbbbb
   b

Notes:  I  : Gb
       IIIb: Bbb
        V  : Db
       VIIb: Fb