He could see the wear Lucifer was causing to Castiel's vessel; having two angels inside was definitely tearing the body apart. There were rough patches on his skin, knuckles red-raw. Without really thinking about it, he reached out and touched his fingertips to the back of Lucifer's hands, healing them. It probably wouldn't last long, but wasn't it the thought that counted?
Despite the eye roll that followed Lucifer's beckoning gesture, he actually did leave his post to trot after his older brother. Old habits died hard. Gabriel let out a low whistle, crossing his arms he stared at Lucifer, eyebrows arched and a smirk firmly in place, "somebody told a big fat lie to sneak out while grounded, didn't they?"