Please don\'t reply I should use ffffd, nemiver, emacs, vim, or any other front-end, I just prefer gdb as it is, but would like to see its output with some terminal colors.
It's not colours, but consider gdb's text gui. It makes a vast difference to how usable gdb is.
You can launch it with:
gdb -tui executable.out
Screenshot:
As you can see, the main features are: