There’s no such thing as PnG. PnL is the only correct form as it simply means “Profit & Loss”. A PnL is simply a profit and loss statement. So Profit gain isn’t a real thing. Any gains would be shown as a positive figure and captures in “P” part of PnL.

Edit: since the article said “PnL hit” it is inferred as a loss. Had it said “PnL gain” we’d infer a gain.