  We study holographic entanglement entropy in Gauss-Bonnet gravity following a
global quench. It is known that in dynamical scenarios the entanglement entropy
probe penetrates the apparent horizon. The goal of this work is to study how
far behind the horizon can the entanglement probe reach in a Gauss-Bonnet
theory. We find that the behavior is quite different depending on the sign of
the Gauss-Bonnet coupling $\lambda_{GB}$. We show that for $\lambda_{GB} > 0$
the holographic entanglement entropy probe explores less of the spacetime
behind the horizon than in Einstein gravity. On the other hand, for
$\lambda_{GB} < 0$ the results are strikingly different; for early times a new
family of solutions appears. These new solutions reach arbitrarily close to the
singularity. We calculate the entanglement entropy for the two family of
solutions with negative coupling and find that the ones that reach the
singularity are the ones of less entropy. Thus, for $\lambda_{GB} < 0$ the
holographic entanglement entropy probes further behind the horizon than in
Einstein gravity. In fact, for early times it can explore all the way to the
singularity.
