Gauge fluxes can be used to break the GUT gauge group in F-theory. We
consider a non-abelian gauge flux associated to a poly-stable bundle
with the structure SU(2)XU(1)XU(1), which is constructed by using
a stable SU(2) bundle and two supersymmetric line bundles.
Then we approach the Minimum Supersymmetric Standard Model (MSSM) from an
E_6 GUT
by using the spectral cover construction and this non-abelian gauge flux.
Starting with an E_8 singularity, we obtain a rank 5 model with the gauge
group SU(3) X SU(2) X U(1)2 by using an SU(3) spectral cover and the
non-abelian flux.
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