Hibiscus is a popular key botanical in gin often taking centre stage. It also pops up in mixers and is found paired with pomegranate and grapefruit where its tart fruitiness finds natural partners. It is the trumpet-shaped flowers or calyces that distillers are interested in. The calyces are tart to the point of bitterness, adding a jammy floral note to gin.
With the recent explosion (is that the right word I wonder?) in interest in gin, it is at risk of developing into something of a cult. The origin of the word cult is that of homage paid to a divinity, so I don't think I am too far out on my assumption. Gin is in.