Really? Why so?

I need a GUI front-end for a C program I am writing.
What would be the best way to do that then?

I'll give you a quick run-down on what I am doing.

I am implementing the HTCPCP (RFC 2324). A copy of which can be found here http://www.faqs.org/rfcs/rfc2324.html
I'm going to develop a server, written in C which I will have running to act as the coffee pot server. I intend to interface with it wirelessly from a PDA client. Perhaps, like a waiter could do at a cafe. This client has to be written in C too. Now, the server is no problem, however, I wish the PDA to have a GUI on it to make it idiot proof so anyone could use it. For this I need a GUI library. I had intended on using QT.

Is this going to be a problem? If not, how would I go about doing so?
If it is going to be a problem, what are my alternatives?

Thank you for your time once more.