A Type D plug in Guadeloupe?
Yes — it seats, earth and all.
Guadeloupe's Type C and Type E and Type D sockets accept a Type D plug (Old British 5 A (BS 546)). Both sides carry an earth, so grounded appliances keep their protection. The wall delivers 230 V at 50 Hz (207–253 V within tolerance) — if your device isn't rated for that (look for "100–240 V" on the brick), an adapter won't save it.
Grid facts verified against IEC World Plugs — Guadeloupe. Physical-fit verdicts derive from pin geometry and each socket standard's acceptance list — not safety advice.