In October of last year, Cody found strings in his teardown of the Play Store 7.1 that hinted at a mysterious “Device Certification” label. Back then, he theorized that it could be an indicator of whether your device was indeed GMS certified and thus supposed to have the Play Store or it could be a SafetyNet check to see if your firmware was modified in any form. The correct answer turned out to be the first one.
The Play Store should soon tell you if your device is GMS certified or not was written by the awesome team at Android Police.