Theoritical :
Bearish continuations.
The only thing different between a
gapping down doji and a regular doji is the gap. That is, a price gap appears between the doji and the prior day.
A doji representative a stalemate between bulls and bears. In this case, price trends lover into the candle (for one day at least) and that favors and hears, but the bulls counterattack and fight all day to gain control.
At the end of the trading day, prices closes at or near where it opened, with neither bulls nor bears in firm control. What happens after that is anyone's guess, but the numbers favor a reversal the bulls will take over.
That goes against the common belief that the gapping down doji is a bearish continuous pattern.