And a second app for quick bike dock status.
For finding free bikes, I use SpotCycle.
BTW, you can use TransitApp to begin using Toronto Bike Share
immediately after purchasing your annual membership, even before your card arrives in the mail. Just remember it's a simple 3-number keypad, the bike unlock codes consists of only 1's, 2's and 3's. Confused me at first. Don't even need to touch the kiosks, just copy the code from TransitApp onto the individual bike dock's 1/2/3 keys (every wheel dock has a keypad).
Also, 30-min (or less) free rentals can be done as many times a day you want, with minimum 2 minutes between rentals, so bike docks are your stopover stations too.
Okay, I am veering off topic.
Back on topic: Yes, all urban GO stations need bike share for
BOTH your first and last mile GO train commutes. Not just first mile. That's something only Bloor/Danforth/Exhibition/Hamilton(!) GO users have the luxury of. And cycle track infrastructure needs to eventually fully reach the transit-optimized GO stations.