Man pages matching name gfarm in section 3:

gfarm.3.en	debian 10 / libgfarm-dev
gfarm.3.ja	debian 10 / libgfarm-dev
gfarm.3.en	debian 11 / libgfarm-dev
gfarm.3.ja	debian 11 / libgfarm-dev
gfarm.3.en	debian 12 / libgfarm-dev
gfarm.3.ja	debian 12 / libgfarm-dev