Holographic dark energy in Gauss-Bonnet gravity with Granda-Oliveros
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  In this paper, we have studied a model of holographic dark energy (HDE) with
a homogeneous and anisotropic Bianchi type-I Universe in the framework of
Gauss-Bonnet (GB) gravity or $f(G)$ gravity. To find an exact solution of the
field equations, we assume that the deceleration parameter varies with cosmic
time $\left( t\right) $. We plot some physical quantities and give
interpretations of the results obtained. Finally, we compared our model with
the $\Lambda CDM$ model by analyzing the Jerk parameter, and we examine the
equivalence between the HDE of the present work and the generalized HDE.
