Here are the 3 convenient links for those Poly & JC students intending to apply for the 3 local Unis this year. The data is 1 year outdated so hopefully they will release the new ones soon. Cheers! =D
NUS: http://nus.edu/oam/gradeprofile/sprogramme-igp.html
NTU: http://www3.ntu.edu.sg/oad2/pdfs/COP.pdf
SMU: http://www.smu.edu.sg/admissions/downloads/pdf/Samp%20Notif%20(SMU)%20COP%20FINAL%20with%20FAQs.pdf