Yes, you can. Make sure you wrap it first. A ziplock bag will be fine.
Answer.
my mother in law freezes her banana nut bread every year (she wraps it in aluminum foil) and then we heat it in the...
You might try soy flour. It's not really flour but it works the same way. The bread may be a bit dry and I'm not sure it will rise the same way, but if you can't eat flour this may be better than...