To add on to the pile of more GDB GUIs, here's one I've made: https://github.com/dzaima/grr. Though it's still got a fair bit of missing features that may be essential for some uses (due to my usage being largely assembly-level, which doesn't need too many fancy features).

Speaking of web-based debuggers, I recenty created a similar project but focused on x86-64 assembly debugging: https://github.com/robalb/x86-64-playground

Vscode also has an ok gdb frontend, very nice when you are debugging embedded microcontrollers

And DDD. A Motif front end.

I like how gdb with qt creator works without any complicated configuration. You click on some breakpoints then hit play and the ide takes care of the rest.

Qtcreator is phenomenal. I don’t like using anything else if possible.

and drop down into gdb for complicated prints of variables and such

VSCode's built in debug interface is also pretty great. I use it with the CodeLLDB extension and LLDB.

I don't really understand why people would use a separate debugger to the one that their IDE has. Most IDEs have solid debugger interfaces.