Can you range scalp gold during London?

Only during the 11:00 to 12:30 UTC lull. The 07:00 to 10:00 UTC expansion window is where breakouts pay and range fades get run over.

Is the Asian session spread too wide to scalp gold?

Sometimes. Check your broker's actual Asian-session XAUUSD spread against your average target. If friction exceeds a third of the target, the window is not tradeable for you.

Best Sessions for Gold Range Scalping

The usable XAUUSD range-scalping windows are 23:00 to 06:00 UTC (Asian session), 11:00 to 12:30 UTC (London lunch lull) and 19:00 to 22:00 UTC (late New York).

Avoid range scalping during 07:00 to 10:00 UTC London expansion, 13:00 to 15:30 UTC New York open, and within 30 minutes of CPI, NFP, PCE or FOMC releases.