Man pages matching name gfkey in section 1:

gfkey.1.en	debian 10 / gfarm-client
gfkey.1.ja	debian 10 / gfarm-client
gfkey.1.en	debian 11 / gfarm-client
gfkey.1.ja	debian 11 / gfarm-client
gfkey.1.en	debian 12 / gfarm-client
gfkey.1.ja	debian 12 / gfarm-client