You asked “when were residents of Gaza forced to leave Gaza?”
I explained that Gazans cannot leave Gaza, because they will be murdered by Israeli forces if they try; this has been in place for decades and is not a security response to 7 October.
Of course, many thousands of Palestinians have been expelled from their homes in Gaza by Israeli bombardments, but none of them have been forced out of Gaza itself, because they will be murdered if they try to leave.