[Q] Restore Full Stock from GPE Lollipop topic

Guys,

So I've converted my XT1032 to GPE so I could get Lollipop update. But now, I need to restore to original Moto Stock so I can recover my warranty. I heard once I convert GPE and install Lollipop, I can't go back.
Can you guys provide me some tutorial if it's possible.

Lots of thanks.