Graphical tool for creating Deb packages

Yes, there's Ubucompiler:, but development has ceased:

Description:

An easy software to ubuntu, debian, linux mint to compile, make, install and create a .deb package

On the other hand, on this wepupd8.org page, a critic of Ubucompiler reads as follows:

Ubucompilator does not add the necessary Build-Depends to the Debian control file so yes, the .deb package can be created with Ubucompilator, but you cannot use the source code to say Launchpad so it can be build for different architectures, etc. Also, the packages are not signed and so on, so that's not the proper way of creating a .deb file

You could try debomatic. It's already in Ubuntu's package archives:

sudo apt-get install debomatic

It provides a simple tool to automate build of source packages with limited user interaction and a simple configuration. It has some useful features such as automatic update of pbuilder, automatic scan and selection of source packages to build and modules support.

It is meant to help developers to build their packages without worrying too much of compilation, since it will run in background and no user feedback is required during the whole process.

The project is developed by a Ubuntu developer: https://launchpad.net/debomatic

GiftWrap is another option.