Transferred iphone Music to Dropbox. What Music App is reccomended?

Can you burn a disc from Google Music Play???

Using a PC and only if you have the music downloaded to your computer. You can't burn a CD from All Access music as that can't be downloaded to your PC. Only stuff that you upload can be downloaded and burned to a CD.
 
I like lossless because I play music through a high quality home system. You can really tell the difference between MP3 quality and CD quality on a good home system. That's why I was wondering about streaming lossless music through Play Music since I do hook my phone up to my home audio system through the headphone jack.

Well, unless blind ABX tests have been conducted, it's difficult to say. Even with a high quality home system, it's not easy to properly differentiate between a lossy file and its lossless source. Just switching back and forth between the tracks isn't enough. But that would derail the topic at hand. You can read more about it on hydrogenaudio and why blind ABX tests are needed before audio quality claims (like lossy vs. lossless) can be made.