Do you mean "libgtk2.0-0"?.. debian/control should be, theoretically, in source code package. Where is the source code for the package? I can find the binary packages here:
http://repository.maemo.org/pool/fre...e/g/gtk%2b2.0/
And theoretically, it should have contained libgtk*.tar.gz files with source code.
In reality, I do not see them. Why?

Still, if you are looking for gtk+2.0_2.14.7-1maemo33+0m5.tar.gz, it is here.

Thank you. Best wishes. Apologies for not replying earlier.
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Per aspera ad astra...