Another Canadian here. My sons went to preschool in Vancouver, Primary (Kindergarten) in Halifax and are now in Alberta. Vancouver, around UBC area had a really high gifted population. Their 3 yr old play-based preschool had approximately 1/4 of the kids who could already read & one of the non-reading 3yr olds used to get together with my sons to play Monopoly Jr, Chess and other board games. It was a lovely fit.
My experience in Halifax was that they readily labeled the boys gifted, and "approved" an IPP (without being asked), but then they told me they didn't do them for the first few years. My reading later indicated that the schools' funding depends on the # of approvals, not how many kids are actually getting extra help.
Alberta seems to be another kettle of fish all together. There are gifted schools, but none in our area with French Immersion. In the end, the boys (now grade 3) aren't getting any extra help and while they have almost finished the language arts resources from the grade 6 room, there is not a single plan in place for what will be done when they've finished that.