...what type of kernel would it have?

I'd say it would be a monolithic kernel, because the Constitution is the foundation of it all (most powerful) but cannot be modified without creating and ratifying amendments (kernel modules). A revolution would be required to recompile the kernel and restart the system.

However, one could argue that it is also a hybrid kernel since there are subnational governments which can make similarly powerful policy, but do not have total access to the kernel. Faults and exceptions within user-mode applications are usually handled by lawyers, which can end up passing through the whole system for them to be gracefully resolved.

Then again, it could also be a real-time kernel given the high (and often inefficient) frequency of polling and interrupts, along with its asynchronous and extremely reliable nature. For maximum protection, certain threads and memory spaces are released every four years to be replaced by new counterparts. The one flaw with this protection mechanism, it seems, is that the threads have a race condition that cause them to compete intensely for these memory spaces, inefficiently stealing billions of CPU cycles across the entire system on all levels.

It would be a very bloated OS. More than windows. Things that kernel should not do such as integrating a web browser into the kernel will be present in this operating system.

Also it will attempt to regulate everyone's personal choices at times even though said choices are victimless.

It depends of the government. If it was North Korea then it would be similar to the TI-Nspire OS. Otherwise, any regime that is democratic or close would be like Windows Vista or worse.

- DJ_Omnimaga (emphasis mine)

Detecting rustled jimmies in this sector.

I think American Goverment, will be an stable OS, free of disruptive and extremist political parties like "Podemos"

For many programs, it would be a luxury or a dream to be executed in that OS.

Spanish goverment may be like Windows Millenium, running Windows Vista 64 bits in a virtual machine (without vt-x), and many toolbars and addware installed in the VM. It would be infected by a virus called Podemos that would be programmed by Venezuela.

If the government is a OS....... It would be a buggy one, as almost nothing gets done in it.