LGT (string-a, string-b)

  Class:  Elemental function - Generic

  Returns a value of true if the first character string is greater
  than the second character string, based on the ASCII collating
  sequence - even if the processor's default collating sequence is
  different.  In VSI Fortran, LGT is equivalent to the > operator.

  The ASCII collating sequence determines the relationship between
  the arguments.

  The arguments must be character expressions.  The result is a
  LOGICAL*4 value.

  This function cannot be passed as an actual argument.