Can I combine my GPA from 2 schools on my resume?

I spent my freshman year at a top STEM school studying a STEM subject, but I wanted to work in finance, so I transferred to a top-20 target school. I finished my degree in finance and math with a 3.6 GPA, and I'm working in quant research at a BB AM shop right now for 0-2 years. My GPA at my old school was a 3.9 (I really hustled to make the transfer happen and grading was easier imo). Lately I've been listing my education on my resume as:

XYZ University - ... - 3.8 (Majors GPA), 3.7 (Cumulative GPA) - ... - Transferred from ABC University

Do you think this is fine or should I separate it? From my perspective, my current employer never asked for my transcript (if they did I would just turn in both in one document), I haven't been questioned about how I've presented it in an interview, my school's career center doesn't have anything online regarding this topic, and I also know of other students who transferred from CCs doing the same, which I think is bogus. I'm only asking, because I was once called out by a quant for my 3.6 being low, and I really don't think quants understand the grade deflation at my school; we're just like Wharton, perhaps tougher given our smaller class sizes. I also think it's unfair people will just completely overlook an entire year of hard work which I didn't have a chance to make up for at my new school when I did list them separately.

Also I noticed UNC's career center is perfectly fine with students doing this (https://careers.unc.edu/sites/careers.unc.edu/file...)