Additional Info: Should I add this in?

I switched high schools halfway through my junior year and because my old high school was more rigorous and my new high school calculates GPA differently and doesn’t have a weighted GPA, my current GPA is much lower than it was before I switched (currently a 3.85). Should I somehow explain this in the additional information section of my Common App or should I leave it be? Thanks in advance!

If I remember it correctly, there is a designated section in the Common Application where you can explain interruptions or changes in your educational progress (i.e. school transfers). IMO, using this section would make more sense than utilizing the additional information section. I hope this helps.