This is a fine rum house that has made until recently one brand, Gosling's Black Seal. This is a rich dark rum in the old British Caribbean tradition. It comes in a 40% and a stunning (ahem) 75% abv version.
Black Seal is blended from a base of old Demerara rums but includes other types I believe and also rums made in both column and pot stills. (Demerara rum is made in Guyana along the river of the same name and is a style of dark rich flavourful rum). Black Seal has an intriguing spicy molasses-like taste. To me it has a scent too of Indian spices, like the smell in an Indian restaurant. I believe the rum is not spiced and the taste derives from sophisticated blending and maturation.
Recently the company released an amber blend, Gosling's Gold, which is its first new rum since the 1800's (also it released an extra-aged version of Black Seal which I have yet to try). The Gold Seal is extremely good. It has a superb balance and at 40% abv a rainwater-like softness and elegant finish. There is a subtle hint too of the "Indian spice" found in Black Seal. I would guess Barbados golden rum is an element but I don't know.
A fine value it is in Canada at some $24 or so.
I find rum really varies in quality even at the same price point. The Gosling rums are really good and happen to be sold for a very reasonable price.
I drink them on their own but also incorporate them in my own rum blends.
Recently I hit on the idea (for my own rum blends) of adding a touch of Charbay blood orange vodka. The orange flavour, which is natural (real juice is used in the Charbay product), marries the blending to which it is added. True, the Charbay is grape-based but that hardly matters. First, I use only a little (the Charbay is quite concentrated). Second, some of the rums in my blend are white rums which are quite neutral-tasting so a little vodka, which is neutral too, is of a piece with that.
The orange flavour is a way of marrying a blend without adding sugar or a liqueur of some kind. Cointreau or Curacao would likeky do as well but adding their own particular taste notes. I think I may bring one of my orange rum blendings to Gazebo upcoming.