How to make a GeForce Experience detectable game for Shield GameStream?

Hello, guys.

I’m developing a game (actually it’s an archviz app) with Unreal Engine 4 and I want it to be compatible with GameStream. Right now I’m able to test it after adding the executable on Steam and and opening Steam Big Picture mode. It’s the process used to play games that aren’t showed on GeForceExperience game list.

My question is: How can I make my game compatible with GameStream right away so I don’t need Steam to intermediate all the process? Does it depends on GeForceExperience supporting my game or is just a matter of adding some code in my game?

Thanks in advance.