Man pages matching name bio::db::gff::aggregator::match_gap in section 3pm:

Bio::DB::GFF::Aggregator::match_gap.3pm.en	debian 10 / gbrowse
Bio::DB::GFF::Aggregator::match_gap.3pm.en	debian 11 / gbrowse
Bio::DB::GFF::Aggregator::match_gap.3pm.en	debian 12 / gbrowse