Motorola seems to be rolling out its Android 6.0 Marshmallow update for unlocked versions of the Moto G 2015. A few users on our forums report that the update is rolling out in the U.S., and it appears to be rolling out in Canada as well. Motorola had previously issued a soak test for the update, and now some users not in the test are reporting seeing Marshmallow roll out.
If you've got a Moto G 2015, you can check for and download the 460MB update by heading to Settings > About Phone > System updates. As a reminder, this update is for the unlocked version of the Moto G. Be sure to let us know how you're enjoying the update in our forums at the link below.