Man pages matching name getgrouplist in section 3:

getgrouplist.3.en	debian 10 / manpages-dev
getgrouplist.3.ja	debian 10 / manpages-ja-dev
getgrouplist.3.en	debian 11 / manpages-dev
getgrouplist.3.fr	debian 11 / manpages-fr-dev
getgrouplist.3.ja	debian 11 / manpages-ja-dev
getgrouplist.3.en	debian 12 / manpages-dev
getgrouplist.3.ja	debian 12 / manpages-ja-dev
getgrouplist.3.en	debian 13 / manpages-dev
getgrouplist.3.fr	debian 13 / manpages-fr-dev
getgrouplist.3.ja	debian 13 / manpages-ja-dev
getgrouplist.3.ro	debian 13 / manpages-ro-dev
getgrouplist.3.ru	debian 13 / manpages-ru-dev