Version 2.1.10 is available upstream. Please consider updating! It seems that version 2.1.10 is available upstream, while the latest version in the Gentoo tree is 2.1.9. You think this warning is false? Read more about it here.
AtlasRep provides an interface between GAP and databases such as the
Atlas of Group Representations, which comprises representations of
many almost simple groups and information about their maximal
subgroups, and is included in the GAP package.