Yes, they review all of that. Along with your transcript, the school sends a “school report”. You can ask your guidance counselor for a copy. Among other things, the report may tell the college the demographics of your school and school district, the average GPA (weighted and unweighted), it tells how they weigh the GPA, the list/number of AP/IB/Honors classes offered, average test scores, etc. The school report says nothing about you personally - it is just the background of the school itself. If admissions isn’t familiar with your high school, they may review that first, so that when they get to your transcript, they are looking at that in the right context, and can better compare you to students from your own high school and to those from other schools.
By the time they read the school report, evaluate your transcript, judge your GPA and level or rigor, review your test scores, read your letters of recomendation and your essay, ponder your extracurriculars, thinking about all this with an eye towards how you might contribute to their campus, jot down a few notes… eight or ten minutes disappears quickly. There is simply no time to review irrelevant information from grade school.