You can use conditional breakpoints and watch expressions in gdb, too. It works how you would expect, not dissimilar to the GUI way.
One advantage is that gdb might be available in more environments.
In general, whatever you are more comfortable with is the better tool. I prefer command-line interfaces for most things, but find it easier to set breakpoints by clicking next to a line of code.
Comments
You can use conditional breakpoints and watch expressions in gdb, too. It works how you would expect, not dissimilar to the GUI way.
One advantage is that gdb might be available in more environments.
In general, whatever you are more comfortable with is the better tool. I prefer command-line interfaces for most things, but find it easier to set breakpoints by clicking next to a line of code.