Shobuz99; Me Too ! ..only because of my own ineptitude (fixable !)
The outputs for "gconf2" ..merely says that the latest versions available are installed ...that means to me that as a dependency for "gnome-terminal-data" this is not an issue. It is there and good .. "gnome-terminal-data" by golly should install !
I am presently attempting to VERIFY that the syntax-version I directed you to use to install is correct. I have some small amount of reservation that the "=" character vice "_" may should be used (??) but do not know where I get that assumption from ---Too many operating systems' syntax under my belt ???. I have got to verify that the directive to the operating system for the installation of "gnome-terminal-data_<version>" is correct !
To move things along ... I see no harm in purging/reinstalling:
and see what the package manager has to say about that !
sudo apt-get purge gnome-terminal gnome-terminal-data
sudo apt-get update
sudo apt-get install gnome-terminal gnome-terminal-data
when stuck, right wrong or otherwise - do something !