I'm not sure of their exact cGPA's but I believe it's over 7.5 at the least for acceptances. The one who had a rejection had a 7.0. uOttawa is pretty competitive especially with the number of students...
Yup! Even last year I believe most of the acceptances were made by the end of February for uOttawa. From my knowledge it's through e-mail (but that's because the ones I heard of were internal...