No. The bare minimum is that Motorola provides the needed baseline hardware security requirements to their future devices. Everything else is just a bonus. There could be green-boot support and/or preinstalled devices, but thats not a necessity. GOS benefits with an official hardware platform, potentially early partner access to AOSP source code, input on hardware and firmware decisions, and Motorola benefits by potentially having GOS features, better hardware security, and making tons of money from alternate OS users, GOS or otherwise.