Per GLEP67 only projects and people can maintain packages. Please either create a project for Catalyst, or inline the maintainers.
There is a project page: https://wiki.gentoo.org/wiki/Project:Catalyst email alias..: catalyst@gentoo.org list.........: gentoo-catalyst@lists.gentoo.org So, what is missing?
For the record, I'll repeat my answer: the e-mail used on wiki page is used as project identifier. In this case, it means you have to use the alias there, and move the mailing list address to the actual page.
seems to be now.