gphelp(1) on Linux
The text 08ab5959237b, as Debian 9 (Stretch) shipped it.
GP-PARI online help script
Flags it lists
-
-cb -
-ch -
-color_bold -
-color_help -
-color_underline -
-cu -
-detex -
-k -
-noskip -
-raw -
-to_pod -
-utf8