  Gauge mediation predicts 10 TeV or heavier squarks because such a heavy stop
is required to explain the observed 125 GeV Higgs boson mass without a large
trilinear soft mass term in the minimal supersymmetric standard model. Although
such a high scale cannot be searched by the LHC directly, gauge mediation also
predicts a hierarchy $\mu^2 \ll B_\mu$ by a simple and naive solution of the
$\mu$ problem. We point out that this simple and naive way of generating the
$\mu$ ($B_\mu$) term works in the case of 10 TeV or heavier squarks with a
slight breaking of a GUT relation among messenger B-terms (or supersymmetric
mass terms). Furthermore, the upper bound on the Higgsino mass is obtained from
the observed Higgs boson mass, perturbativity of a relevant coupling, and
conditions avoiding tachyonic sneutrinos and stop. It turns out that the light
Higgsino of O(100) GeV is a promising signal of gauge mediation.
