gmtlist(1gmt) on Linux
The text b6f92d4f49a3, as Debian 5.0 (Lenny) shipped it.
A data-extractor for <legid>.gmt files
Flags it lists
-
-C -
-Da -
-Db -
-F -
-G -
-H -
-R -
-Sa -
-Sb -
-V -
-W -
-b