Compatibility summary
Your Italy plug may fit in Guadeloupe outlets, as both use at least one common plug type.
Plug comparison
Italy plug types: C F L
Guadeloupe plug types: C E
Both countries share at least one plug type (C F L and C E), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
Italy: 230V, 50Hz
Guadeloupe: 230V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.