Question concerning bundling cygwin with another application

["NBroenner@gmx.de" <NBroenner@gmx.de>]

Dear Sir or Madam,

i'm currently developing a non-commerical software under GPL for my 
modell railroad. It uses SRCP as a client, a protocoll for controlling 
model railroads. The only SRCP-Server available is the SRCPD which is 
written for Linux/Unix/Cygwin. Now i want to bundle the compiled SRCPD 
(non-commerical open source, can be found under www.sf.net) with the 
cygwin-dlls and the bash.exe to run it. Here are the needed dlls/exes:

    * cygintl-8.dll
    * cygioperm-0.dll
    * cygreadline6.dll
    * cygwin1.dll
    * cygxml2-2.dll
    * cygz.dll
    * bash.exe

Now my questions:

    * Is it possible to bundle these dlls, since both projects are under
      GPL and non-commercial ? What do i have to do (f.e. Should i
      mention cygwin somewhere ....) ?
    * Which apps / dlls etc are not meant to be used that way (to be
      bundled with GPL-SW, f.e.) ?

Thanks in advance.

With kind regards,
Nils Brönner