Thermal equilibrium nuclear orientation was employed to orient nuclei of $^{196}\mathrm{Au}$, $^{198}\mathrm{Au}$, and $^{200m}\mathrm{Au}$ as dilute impurities in nickel and iron at temperatures down to 4 mK. The degree of nuclear orientation was determined from the anistropy of $\ensuremath{\gamma}$ radiation emitted from the oriented nuclei. For $\mathrm{N}\mathrm{i}(^{200m}\mathrm{Au})$ both the magnetic hyperfine interaction $|\ensuremath{\mu}H|=(7.65\ifmmode\pm\else\textpm\fi{}0.30)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}18}$ erg and the magnetic hyperfine splitting $|\frac{\ensuremath{\mu}H}{I}|=(6.473\ifmmode\pm\else\textpm\fi{}0.012)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}19}$ erg were determined from an analysis of the temperature dependence of $\ensuremath{\gamma}$-ray anisotropies and by nuclear magnetic resonance on oriented nuclei (NMR/ON), respectively. As a result the spin $I$ and the magnetic moment $\ensuremath{\mu}$ of the isomeric state could be derived as ${I}^{\ensuremath{\pi}}={12}^{(\ensuremath{-})}$ and $\ensuremath{\mu}({12}^{\ensuremath{-}})={+}{(\ensuremath{-})}(6.10\ifmmode\pm\else\textpm\fi{}0.20){\ensuremath{\mu}}_{N}$. From the measured anisotropies of five $\ensuremath{\gamma}$ rays originating from the ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of $^{200m}\mathrm{Au}$, spins and multipolarities could be assigned in the $^{200}\mathrm{Hg}$ decay scheme. Nuclear magnetic resonance was also observed on oriented $^{196}\mathrm{Au}$ and $^{198}\mathrm{Au}$ in nickel at frequencies of 58.3\ifmmode\pm\else\textpm\fi{}0.4 MHz and 58.5\ifmmode\pm\else\textpm\fi{}0.4 MHz, respectively. The hyperfine interaction for Ni($^{197}\mathrm{Au}$), measured previously by spin echo, and our result for Ni($^{196,198}\mathrm{Au}$) agree with the known atomic hyperfine anomalies between $^{197}\mathrm{Au}$ and $^{196,198}\mathrm{Au}$ only if the hyperfine field is assumed to have a noncontact contribution. For Ni($^{196,198}\mathrm{Au}$) with ${H}_{\mathrm{hf}}=(\ensuremath{-})260.8\ifmmode\pm\else\textpm\fi{}1.3$ kOe, the contact part is then found to be ${H}_{\mathrm{c}}=\ensuremath{-}367\ifmmode\pm\else\textpm\fi{}70$ kOe, with the noncontact contribution amounting to ${H}_{\mathrm{nc}}=+106\ifmmode\pm\else\textpm\fi{}70$ kOe. The angular distributions of several $\ensuremath{\gamma}$ rays are in excellent agreement with a decay scheme proposed by Cunnane et al., in which they found negative-parity levels of spins 5, 7, 9, and 11 at energies of 1852, 1963, 2144, and 2642 keV, respectively, in $^{200}\mathrm{Hg}$.