No.
This was discussed before.
The closes I will EVER even consider is an idea from a different game where the ruler has the power to shift government type by one "step" ONCE. But that would require a different setup of government systems (among other things, ours aren't on a linear scale).
Why? The elections are what matters. For instance, D'hara acts a republic but its government system is a monarchy. We have roleplay to go with that, but I am pretty sure they would have changed it to a republic if they could have when its transitioned its elections.
