VMS Help FORTRAN, /CONVERT, VAXG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Specifies that numeric data in unformatted files is in little
  endian integer data of the appropriate size (INTEGER*1, INTEGER*2,
  or INTEGER*4) and Compaq VAX floating-point data of format
  F_floating for size REAL*4 or COMPLEX*8, and G_floating for size
  REAL*8 or COMPLEX*16, and H_floating for REAL*16.