Yamaha Music Cast Connection

[alanfw]

Just got a new Yamaha receiver that sounds brilliant with bluetooth but because Bluetooth drops out when I'm listening to my outdoor speakers I want to cast over WiFi. I can't seem to do this directly to the receiver unless I add a Chromecast device to the receiver. Is there a way to connect GMMP with the Yamaha Musiccast app?
(Sure, I can play music from my phone using the Yamaha app, but GMMP has been my favourite player for years and has features I haven't found on another player)

[GoneMAD]

gmmp only supports those devices who support google's cast api