PS -> GnuPG does work with gpg2. Verified on a Gentoo box, and a few other distros.
Am I the only guy working with the GnuPG module on CentOS 7? 'Cause I just tested it with a fresh out of the box CentOS 7 image and Vendor perl (5.16.3) and it fails the exact same way as 5.20.2.
Severe weirdness!