  Present investigation devoted to the dynamical study of Relativistic
Hydrodynamics with some thermodynamical characteristics in $f(R,G)$ gravity
towards spatially homogeneous isotropic cosmological model filled with
isotropic fluid. We govern the features of the derived cosmological model by
considering the power-law inflation for the average scale factor. The
temperature and entropy density of the proposed model are positive definite. We
also discuss the energy conditions to our solutions. The strong energy
condition violated, which indicates the accelerated expansion of the proposed
model.
