Mentioning Subject GPA on SOP I'm a Korean student applying to math graduate schools this year. I'm mainly applying to American universities but I will also be applying to some schools in UK and Europe.

I wanted to know if it would be worth mentioning my subject GPA in the statement of purpose. My overall GPA is 3.7/4.3, but my math GPA is 4.14/4.3, so there is a significant discrepancy here. I heard before that admission team would look at my math courses separately, but tabulating grades from math courses out of a 4-year transcript seems like quite a chore for the admission team. Thus I thought it may be better to summarize it for them somewhere (lest they focus on my lower overall GPA instead).

Would it seem quite unnatural to bring up such scores in a SOP? 

Thank you in advance.
I think your SOP should focus on that, not your past record. The committee will have access to your grades and will focus most on the subject grades in any case. There is no need to waste words on things that can better support your candidacy. Yes, you are proud of your past work, but your CV already shows that. 

Write about what you want to do in the future, how your interests and skills align with that purpose. If necessary, talk about how you fit well into the program you hope to join. 

Make your SOP work to complement your CV, not to repeat it.