When comparing Gedit vs Code::Blocks, the Slant community recommends Code::Blocks for most people. In the question“What are the best Arduino IDE alternatives?” Code::Blocks is ranked 1st while Gedit is ranked 4th.
Ranked in these QuestionsQuestion Ranking
Pro Plugins allow for added functionality and customization
There are tons of plugins for productivity available in many different workflows, such as a dictation plugin, an encryption add-on, a whitespace remover, and more.
Pro Great UI
The UI is lean and minimal. Everything feels quite fast and it is easy to add custom shortcuts for doing things like compiling, deploying, or testing.
Pro Available on all systems that use Gnome
Gedit is the official text editor for Gnome and it's available wherever any version of Gnome is installed. With thousands of people using it daily and not even realizing it.
Pro Easy to use
Pro Simple Library import
Con Not a lot of features
Gedit is a text editor. Though it's simple and fast, it misses a lot of features, most notably auto-complete for several languages.
Con Confusing interface
For example, finding anything in the settings menu is hard. Most other text editors use Edit->Preferences for managing settings but this is not the case for Gedit.
Con Not very feature rich
By default it's not much more than "What if Gedit had a compiler and a terminal built in?" (or: "What if Notepad had colour coding, auto indents, file structure, a compiler and a terminal built in?")
There are far more professional IDEs out there. This one is much too basic for any efficient use.
Con Lots of functionality is encountered only in plugins
You can't change keyboard shortcuts, neither share themes with vanilla codeblocks, for example.
Con Slow navigation using mouse
In most IDE's, you can "goto declaration"/"implementation" by holding CTRL and left-clicking on an identifier or include directory. This does not work in Code::Blocks no matter what settings you have. Right-clicking will bring-up a menu that includes these "goto" options, but it's not instant and you'll be slowed down immensely depending on how often you have to do it.