  We suggest SU(5)$'$ in the hidden sector toward a possible gauge mediated
supersymmetry breaking scenario for removing the SUSY flavor problem, with an
example constructed in $\Z_{12-I}$ with three families. The example we present
has the Pati-Salam type classification of particles in the observable sector
and has no exotics at low energy. We point out that six or seven very light
pairs of ${\bf 5}'$ and $\bar{\bf 5}'$ out of ten vectorlike $\five'$ and
$\fiveb'$ pairs of SU(5)$'$ is achievable, leading to a possibility of an
unstable supersymmetry breaking vacuum. The possibility of different
compactification radii of three two tori toward achieving the needed coupling
strength is also suggested.
