mobile

My son has a S III with root and CM on it. He clicked on the accept on a system update yesterday and sent the phone in a bootloop. I done a system reset/factory data reset on it and it boots up now and has service. But there is no Google play icon and it won't let you add a Google account. I've done the reset and wipe 3 times and it never asks you to enter any Google account info when the phone first boots up. What am I missing here. I have a note 3 that's rooted and running biggins rom. I've rooted all my phones which total about a dozen or so and have never seen this happen. Anyone have any ideas how to get the play store back on it and Google account. Thanks in advance.