MSAs:
  10Bit
  200 Pin(aband.)
  300 Pin
  DWDM
  GBIC
  HSBI(aband.)
  SFF
  SFP
  QSFP
  X2
  XENPAK
  XFP
  XGP(aband.)
  XPAK(aband.)

Giga-bit Interface Converter
(GBIC)

The  GBIC spec has been completed and is now maintained by the SFF committee.
 For the latest update, please check the SFF committee ftpsite. 
The document # is SFF-8053.PDF

GBIC document