Two weeks is nowhere near enough time to get to grips with any kind of GUI programming (even if you're using toolkits, e.g. Qt). Display the data as text instead. (I've done loads of GUI programming and I can guarantee that you *will* need at least 3 months to get the hang of a GUI.)

So if you're only "thinking you might want" then start thinking you don't want. If it's a project requirement then your only hope is to get hold of someone who already knows how to do GUIs with c/gcc/$YOUR_OS/$YOUR_WM - and even then, two weeks is cutting it fine.