Does the Magic Trackpad (and I guess the Magic Mouse) “work its magic”, function, gesture... when using Windows 7 or 8 either in Boot Camp or in VmWare Fusion /Parallels etc, or is Gesture Control confined to the Mac Operating System, as Gesture Control is not a part of Windows but is inherent to Mac OS X 10.6 > Snow Leopard, Lion & Mountain Lion ?
"Magic" and "Gestures" are too subjective to comment on. However, gestures such as two-finger-scroll, tap-to-click, bottom-right-click do work. I have tried this with Windows 8 on MacBook Air. You have an option to select the settings you want in the Boot Camp Control Panel.
There may be other 3rd party drivers such as Synaptics Gesture Suite that let you configure other gestures.