Let’s take a moment to appreciate Baskerville healing abilities (and Mochijun’s foreshadowing skills)
Gilbert was shot right in the chest (Retrace 65), and a few hours later is fully healed without even a scar (Retrace 79). This flawless healing wasn’t possible when he was sliced in half by Oz because he hadn’t had access to his full abilities as a Baskerville then. Same goes when he was attacked by Cheshire perhaps, though I wonder why he didn’t get a scar from that either (maybe it just wasn’t as deep as the sword wound.)
On another note, though, the Baskerville super-fast healing ability is confirmed by Jack, when he comments that he doesn’t mind the fact the attack on Gil didn’t leave a scar (Retrace 38).