Thank you for your feedback. You can look this: https://github.com/rohanrhu/gdb-frontend#gdb-related-issues-... I will implement adding additional folders to sources.

You can check this demo: https://www.youtube.com/watch?v=6LNR8u19x6Y

If something is wrong for you, you can create an issue on Github.

You can set breakpoints via clicking line numbers.

I did not implemented shortcuts yet. :)