Neutral Scot here, when it comes to the Old Firm. I hate them both equally.
I think it would be a great job for Gerrard to get for his first appointment. There is no real expectation of Rangers overhauling Celtic any time soon. It's a free hit for him really, as long as he gets out before Celtic do the 10th. On the other hand, if he stops Celtic getting the record, he'll be a legend there.
It would be a better grounding for him than it was for Souness back in the day, that's for sure, if that is what people are worried about.