xyz2grd(1) on Linux
The text 114ffc69e111, as Debian 2.2 (Potato) shipped it.
Converting an ASCII or binary table to grd file format
Flags it lists
-
-: -
-D -
-F -
-G -
-H -
-I -
-L -
-N -
-R -
-S -
-V -
-Z -
-bi