  We study gluino decays in the Minimal Supersymmetric Standard Model (MSSM)
with squark generation mixing. We show that the effect of this mixing on the
gluino decay branching ratios can be very large in a significant part of the
MSSM parameter space despite the very strong experimental constraints on quark
flavour violation (QFV) from B meson observables. Especially we find that under
favourable conditions the branching ratio of the the QFV gluino decay gluino ->
c bar{t} (bar{c} t) + neutralino_1 can be as large as about 50%. We also find
that the squark generation mixing can result in a multiple-edge (3- or 4-edge)
structure in the charm-top quark invariant mass distribution. The appearance of
this remarkable structure provides an additional powerful test of
supersymmetric QFV at LHC. These could have an important impact on the search
for gluinos and the determination of the MSSM parameters at LHC.
