Version 2017.1 has been released: https://github.com/inducer/pycuda/releases According to my test, copying pycuda-2016.1.2.ebuild to pycuda-2017.1.ebuild (and running "ebuild pycuda-2017.1.ebuild digest") suffices for the version bump.
commit 0389abb82baacd7b85f7e72bf32da062db826ffc Author: Sébastien Fabbro <bicatali@gentoo.org> Date: Sat Jul 29 21:06:06 2017 +0000 dev-python/pycuda: version bump Package-Manager: Portage-2.3.6, Repoman-2.3.3