Seven stable stationary points, corresponding to three pairs of mirror-image conformers and one Cs symmetry conformer, have been located on the potential energy surface (PES) of neutral glycine amide at the B3LYP/6-311++G** level of theory. Accurate geometric structures, relative stabilities, and harmonic vibrational frequencies have been investigated. More importantly, the intramolecular H-bond formed from the amide to the amine plays a key role in stabilizing the global minimum, as observed in alanine amide and has been discussed qualitatively from the viewpoint of the structures, charge distributions, and vibrational analyses. As an important supplement in property for glycine amide, other property parameters, such as gas-phase basicity (GB), proton affinity (PA), and ionization potential (IP), have been predicted. The Boltzmann equilibrium distributions for the seven conformers have also been discussed qualitatively through the calculations of Gibbs free energy at various temperatures. At room tempera...