During configuration, GyachI (v1.2.2 to v1.2.6) gives this error message: "cannot find include file gpgme.h." But libgpme11-dev 1.2.0-1.2 is installed on my system (Debian Squeeze with the latest updates) and gpgme.h exists in '/usr/include/'. About six months ago, I could compile the gpgme plug-in on this system. So, perhaps GyachI can't find later versions of gpgme for some reason. I've seen similar reports from different Linux distros in the Internet.
BTW, GyachI can be compiled with --disable-plugin_gpgme.