It is not just glued on. there are two pins on the underside of the badge (left and right of center) that slides into to keepers on the trunk lid. Make sure when you loosen the adheasive that is holding the badge on tightly, that you carefully work your way around the badge as you slowly apply some leverage. Too much leverage on the top and bottom and the badge will warp slightly, causing a gap in the final fit when you put the badge back on. Apply most of your pressure on the left and right sides. Be prepared to buy a new one if it gets warped. $35 to $40 if memory serves me right.
Take note of the direction of the pin keepers that sit in the holes on the trunk lid. You need to place them back on the trunk in the same orientation as they came off. If I remember right, they should go on so it looks like a backwards "C" with the gap facing left.