./ggsci: error while loading shared libraries: libnnz10.so: cannot open shared object file: No such file or directory

Yes; this is when you bring up the oracle golden gate console.

Ensure the right oracle home is installed for the Golden Gate version installed.

In this case the golden gate program tries to use libnnz10 that is part of your 10g oracle home.Set manually the $LD_LIBRARY_PATH or set $ORACLE_HOME to point to a 11g oracle home.

libnnz11 > when you using 11g golden gate media.

and libnnz10 > when you are using 10 GG media.

Most importantly make sure your your variable are set right.

Hope it helps.
#################################################################################