Last I checked last year it was summer only and only on certain trains and only at certain stations. So much for riding the Portage Trail out to Michigan City and taking the train back
I doubt they will go year round. The South Shore uses special cars for their bike trains where half the car is used for bike storage (not one or two bikes per car with the possibility that there will be no space on a particular train). The bike cars are the older single level cars that cannot be mixed with the gallery cars.
The "certain stations" is improving. Construction is limiting bikes to East Chicago and west this year. When the double track project wraps up next summer will have high level bike friendly platforms at nearly every station. (ADA friendly too for wheelchairs and other mobility impaired. Stroller and wheeled suitcase friendly too. - Mind the gap.)