How do I get a value of the Gibbs energy of formation at 0 K and 0 bar?

The standard Gibbs free energy of formation for copper(II) oxide, $\ce{CuO}$, is $\Delta\_\mathrm fG (\pu{298.15 K},\pu{1 bar}) = \pu{-129.7 kJ mol-1}$.


How can I get $\Delta\_\mathrm fG (\pu{0 K},\pu{0 bar})$, the limiting value of this?


I want to compare it with the approximate value obtained by density functional theory calculations:


$$\Delta\_\mathrm fG (\pu{0 K},\pu{0 bar}) \approx E^\text{Total}\_\ce{CuO} - E^\text{Total}\_\ce{Cu} - \frac{1}{2}E^\text{Total}\_\ce{O2}$$


