I tried to configure C-g as the abort key instead of q because I am used to it.

This is the setting:

[bindings]
root.quit = ["ctrl+g", "<esc>"]

However, when I start gitu with this setting, abortion of anything including gitu itself is impossible. It seems to regard the binding as q doesn't work anymore, but it doesn't respond to C-g either.

Would be really nice if that could work.

While we're at it: maybe you consider adding C-c as some kind of fallback binding as well?