Comment on "The generalized Boltzmann distribution is the only distribution in which the Gibbs-Shannon entropy equals the thermodynamic entropy" by X. Gao, E. Gallicchio and A.E. Roitberg [J. Chem. Phys. 151, 034113 (2019)]
The title of the paper leads to an incorrect conclusion as we show that the equilibrium result of the paper is a special limit of a general result for nonequilibrium systems in internal equilibrium already available in the literature. We also point out some of the limitations of the approach taken by the authors.