QTGMC() with default settings requires only these core plugins: MaskTools2, MVTools, nnedi3, RgTools. Use the plugins that Groucho2004 linked to. For nnedi3 you can use the
official nnedi3 or
nnedi3 for AviSynth 2.6. If you want to use other features like denoising then you'll need FFT3DFilter or dfttest, read the
documentation for more info.
I see you're using AviSynth 2.60 Build Feb20 2015, wouldn't hurt to update to the
latest version.