Man pages matching name bio::searchio::writer::gbrowsegff in section 3pm:

Bio::SearchIO::Writer::GbrowseGFF.3pm.en	debian 10 / libbio-perl-perl
Bio::SearchIO::Writer::GbrowseGFF.3pm.en	debian 11 / libbio-perl-perl
Bio::SearchIO::Writer::GbrowseGFF.3pm.en	debian 12 / libbio-perl-perl