Same here. I think I've used them all over the years, and nothing can compare with micro. I only use nano anymore if I'm forced to. Every Other Interesting Distro that I investigate requires me to do some endting from the terminal, and sometimes nano's the only editor that's available.
So, is gnome-text-editor designed for in-terminal editing? Is that what differentiates it from GEdit? If so, it might be worth a look.