(See summary) Also, I think gpasman belongs under app-crypt instead of x11-misc, since it is a cryptographic password manager.
Created attachment 16080 [details] Ebuild for gpasman-1.9.2
For now, the only gpasman ebuild in portage is for gpasman-1.3.0, which is buggy (segfault) when opening a password file larger than 2Ko. The 1.3.1 release fixes that. The only thing to do is changing the ebuild's name to gpasman-1.3.1.ebuild
gpasman-1.3.1 is now in portage. I am holding off on the 1.9.x series until it has a "stable" release.