GTChannel and partner content is now available on the Endless TV app. Endless TV is a mobile app that enables you to see TV and internet videos. GTChannel is located in the Sports section.
The app is available on Android and iOS.
The interface is actually pretty cool once you get to the channel as you can just scroll through videos with a swipe. The best part about this app is that there are no pre-roll ads. The ads only come up when you choose to see the description of the videos.
Besides GTChannel, there are many of the major video outlets like ESPN, CNN, Vice, Comedy Central etc is available.
Check it out.