I am assuming the GP also implies taxation on the value claimed for the patent. Tangentially, I would also love the equivalent option the other way around, I.e.

I am assuming the GP also implies taxation on the value claimed for the patent. Tangentially, I would also love the equivalent option the other way around, I.e. in property taxation, where the government decides the value of the property, to also be obliged to buy the property at that price if so asked by the owner, an option contract of sorts.