Gpx based workout

Hey, since I’ve been riding in the mountains more often, I’ve noticed that my workout blocks are often badly timed. For example, having to do my VO₂ max or tempo intervals while going downhill, and then doing Zone 1 or 2 when climbing a 12% gradient. I was wondering if it would be possible to add a feature where you can upload a GPX file to Join, and it automatically fits your workout to your route.