There's no way to know, Google and the other big inbox providers don't reveal exactly how they do spam scoring, to avoid spammers from gaming it. You would hope

There's no way to know, Google and the other big inbox providers don't reveal exactly how they do spam scoring, to avoid spammers from gaming it. You would hope they are using heuristics like domain reputation and email content over IP address reputation. That being said if you send from a new or rarely used IP, every inbox provider will greylist you at a minimum, which causes delays.