High-density nanocrystalline (n-) Au was prepared by the gas deposition method. Various anelastic and plastic creep processes associated with the grain boundary (GB) regions were observed. The vibrating reed measurements at 10² Hz with strain amplitude of 10⁻⁶ show a very broad internal friction peak near 95 K, Q_p,95 K⁻¹, and a steep increase in the anelastic strain above 200 K, ε_a-I,>200 K. The tensile tests show a steep increase in the anelastic strain above 200 K, ε_{a-II,>200 K}, for the stress beyond a few MPa and a linear plastic creep strain above 200 K, ε_pc-1, for stress range between 30 MPa and 150 MPa. The activation parameters, 1⁄τ₀ of 3×10¹¹ s⁻¹ and E of 0.16 eV, are found for Q_p,95 K⁻¹, where τ₀ and E are a pre-exponential factor and an activation energy of the relaxation time τ. We surmise that simple relaxation processes are responsible for Q_p,95 K⁻¹. The values of 1⁄τ₀ and E found for ε_a-I,>200 K and ε_{a-II,>200 K} decrease with increasing the applied stress or the temperature, indicating that their atomic processes are the same feather. Further, E found for ε_pc-1 is similar to or slightly smaller than that of ε_{a-II,>200 K}. These observations indicate that the atomic motions in the GB regions of n-Au develop in scale in the order of the underlying processes for ε_a-I,>200 K, ε_{a-II,>200 K} and ε_pc-1, and are so different from those in the conventional polycrystalline Au.