gphelp(1) on Linux
The text 5aabb50d88d6, as Debian 13 (Trixie) 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