The RNC is certainly farther right than most for sure. But they do have some left-wing principles...
School choice is a central beleif of the right-wing. That is a reduction of centralized power in education allowing schools to compete for students and allowing parents to pick private schools even if they cant afford it with the same moeny fueling the public system.. So it is one example of a left-leaning principle that the GOP supports.
while admittedly the GOP is very strongly right leaning, its not a purely right-wing party