Actually, it is. I'm basing that on posts by applicants who called admissions offices and were actually TOLD that the school screens for certain GPA and/or MCAT levels. I'm not saying that ALL schools do this, but many do (whether they openly admit to it or not). This is especially common at state schools, which often have higher cutoffs for OOS applicants. Examples: Jefferson has told 2 different people that they reject anyone with a less than a 9 (!) in any MCAT section. Mayo uses what we call the "
LizzyM" score (10*GPA + MCAT); you need 60-62 to get an interview. Chicago won't take anyone with less than a 7 on an MCAT section. Iowa requires 10 per section for OOS. OHSU requires 3.6/36 for OOS. And there are a bunch of schools which prescreen before sending out secondaries, although they don't advertise their cutoff points: Kansas, Toledo, Illinois, Indiana, VCU, EVMS, UW, Vandy, Wake Forest, WVU, Hawaii, Wayne State, Louisville, Alabama, Loyola ...
One way to get an indication of whether a school screens is to search the MDapps database. Use "advanced search" and look for people at that school who got interviews with the GPA and/or MCAT score you have; the results can be very informative. While MDapps obviously doesn't show every application to a given school, the database is so large now now (about 11,000 profiles) that it's actually a decent-sized sample for spotting trends.
In my case, I searched on SUNY Downstate (one of my state schools) and couldn't find a SINGLE CASE of a non-URM with a 7 in PS getting an interview, although plenty of people with my TOTAL MCAT score and GPA did get interviewed and admitted. So when I was recently rejected there without an interview, despite a very strong application and the fact that they interview 1/3 of in-state applicants, that led me to strongly suspect that the MCAT score was the culprit.
As you can see in my previous post, I'm not saying anyone with low stats should give up without even trying: I'm one of those people myself, and I've managed to get 2 interviews so far. But forewarned is forearmed: if you can take one more class and get your 2.98 GPA to 3.0, that could save you a lot of grief.