Comment 8 for bug 1682874

>>Yes, wine32 is installed at your computer. But if it was not installed,
>>then you would get the above mentioned message.
>But it IS installed and I DID get the above-mentioned message...!

Not sure, if there is still something to settle out. But to avoid further delays, let's both always literally cite the messages we refer to.

You have confirmed with "apt policy wine32" that it is installed - good.

Your initial issue with running the Windows version of Gimp with Wine is solved - even better.

GDebi tells you "Error: no longer provides wine32"
--> This is a bug in gdebi, therefore I added gdebi to this bug report, and additionally filed #865580 against gdebi in Debian.

Synaptic tells you "The list of installed files is only available for installed packages"
--> This is a bug in synaptic, therefore I added synaptic to this bug report, and additionally filed #865578 against synaptic in Debian.

Finally, I mentioned that if wine32 is not installed and you start wine from the command line you'd get a warning hint:

  multiarch needs to be enabled first. as root, please
  execute "dpkg --add-architecture i386 && apt-get update &&
  apt-get install wine32"

So when you said in your previous message

  But it IS installed and I DID get the above-mentioned message...!

did you refer to this hint? Then we'd really have a bug in the wine packages.
In that case I'd ask you to post (again) the output of thefollowing commands:

apt policy wine32
dpkg --print-architecture
dpkg --print-foreign-architectures
ls -l /usr/lib/wine*
wine --version

Greets
jre