I try install DSP Manager on my MotoG with 4.4.2 US rooted follow the guide of "lost101" and work fine with Google Music
It seems that not all the effects are working properly but the equalizer is ok!
Current phone: MotoG 16Gb
Current ROM: Official 4.4.2 US rooted
Past phones: iPhone, iPhone 3G, iPhone 3Gs, iPhone 4, iPhone 4S, iPhone 5, Nexus 4, Samsung s4