First, let the temperature T and T* and gas constant as R and R* in kelvin scale and G scale respectively.
Formula for ideal gas is
PV=nRT which is further equal to nR*T* i.e. RT = R*T*
Given value of magnitude of ideal gas constant is 1.00

From the formula, T* =
(value of gas constant is

T* =

T*=
Thus, the temperature scale for which the ideal gas constant is 1.00
is