GT 1050 or GTX 1050? If it is a GT 1050, which I am not even sure if it exists, then you might not be able to run rocket league that well by itself, let alone stream it. If it is a GTX 1050, then, after a few settings are adjusted on your encoding software (plenty of guides for that for each Encoding Software respectively), it should run fine!
One thing that might be an issue, though, is only 4GB of RAM. That might hurt the stream a bit, especially since the streaming software is sharing RAM with Rocket League. It might work fine though. You really would just have to test it, because I have never tested it myself.
- Memeilicious