What levels of graduate schools can various combinations of GPAs and GREs get you into
I'm presuming that you are referring to PhD admissions in the U.S.?  I should note that GPA and GRE are relatively low on the admissions criteria as far as I am aware.  There are other (more important) factors involved, such as research/teaching experience, statement of purpose, and especially letters of recommendation.
GPA can only help up until a certain point (usually around 3.3-3.7).  Once you are above this threshold, you are better focusing on other aspects of your application.  Especially since PhD programs are all about research and publications, focus on getting as much of that as you can, since this is also how you can get quality letters of recommendation.  I have heard of people with GPA's of 3.1-3.3 getting into top programs (even MIT) because they had research experience or publications.
Also, GRE is one of the least relevant parts of your application (less so than GPA), since it mainly serves as a filter.  Once your score is above a certain threshold, same with GPA, your time is better spent stressing over other parts of the application.  Some schools have stated they do not consider GRE (even before COVID), and because of COVID, while some will still consider GRE, the list of schools that won't require GRE is likely to grow.
HYPSM: your mileage will vary here.  At least in my field (Computer Science), Stanford and MIT are definitely at the top.  However, for Harvard, Princeton, Yale, etc. mileage may vary more, since there are state school programs like Illinois, GA Tech, that are ranked higher.  So it isn't necessarily the best comparison, to compare programs like &quot;good state schools&quot; between &quot;HYPSM&quot;