"meet a minimum core average of 65%, or 2.50 GPA on a 4-pt scale, calculated on all attempts at first-year prerequisites (Biology, Chemistry, English, and Mathematics [Calculus])" those are the core courses. So last 30 + first year prereqs
This is not an official exact conversion table that UBC uses but it may give you a good estimation. https://students.arts.ubc.ca/advising/academic-performance/gpa-equivalency/