Some good news. Around the 1:40 min mark in this video, the Metrolinx representative states that the Caledonia GO station platforms are in procurement with an award targeted for end of year.
Only Metrolinx finds ways to make to make construction of a simple train station drag on for over a decade.
I guarantee you Volkswagen, and Toyota will complete their massive manufacturing plants from scratch faster than Metrolinx will construct any of the new GO stations in Toronto.