Where do I go to get guardianship paperwork?

If you have the means, a lawyer is definitely the way to go to handle a guardianship case for you. You will need to establish in a court of law that the person is mentally incompetent. Once that is done, you can apply for guardianship. Any other kin will be notified and will/should have a chance to contest your appointment as guardian, should they want to do that. I mention these things because -- like others here said already, guardianship isn't something that you simply request and it's granted. There is a process. If your Loved One truly needs a guardian, there is also pro bono help available, in my experience.

Where I live, there are people who help with guardianship for free at the Probate Courthouse. This is in a large city. There may be similar resources in your nearest large city. You can ask them about the paperwork needed, how to fill it out, there may be a legal aid phone line, and you can go that route if you're not in financial position to pay heavy attorney fees. Just some additional info since we're on the topic... :)  Also, if you're handy with searching online, or know someone who is, they could find out where those types of resources could be found.  

True, u need a lawyer. Medicaid allows the use of money from the person ur are getting guardianshp over to be used.

You have to go to court with documents that the person is incapacitated from at least 2 medical professionals. The cost is paid by you up front and can run from $3000-$8000 depending on the state and whether the person fights it. You really ought to consult a lawyer because you don't just "get paperwork to be a guardian".