Alle-Meije Wink successfully compiles and run CamBA on Windows using cygwin. Please email Cinly Ooi to put you in touch with him if you want a copy. As cygwin is a third party GPL program, we need to make sure we satisfy our obligation to you under GPL, as such, the download may be larger than necessary.
The situation with the GUI is more complicated and is currently under evaluation. The preliminary evaluation says it is possible. See here