Several games included in the Moblin Garage use three of ggz libraries
(http://dev.ggzgamingzone.org/libraries/):
libggz.so.2
libggzcore.so.9
libggzmod.so.4

All modern distributions provide these libs and they seem to be relatively
stable. (At least developers are careful with ABI compliance and change sonames
in case of incompliant changes. A question here is about any plans on soname
changes in the nearest future? It seems that these libs are stable enough for
Moblin spec purposes, though probably someone can give more comments on this.)

There is also a gtk binding for ggz (libggz-gtk.so.1) which is used by freeciv.
Unlike the main ggz libs, this one is not included in some modern distros. It
is available in Karmic; in Moblin itself, it is available from the Garage
repository. Not sure what about openSUSE.