Baeckea gunniana occurs in alpine and sub-alpine sites, and is generally found in heath and sedgelands in wet rocky sites or bogs, above 1000 metres altitude. It is found chiefly south from the Kosciuszko district, and also at Mt Ginini in the ACT, and is also found in New South Wales, Tasmania and Victoria, where it is confined to alpine and subalpine areas where it is commonly found along streams and in bogs.

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Baeckea gunniana is a glabrous, densely branched and aromatic shrub around 0.5-1 metre in height, although it can reach 2 metres in lower altitudes. It is sometimes prostrate or spreading over rocks and boulders. The leaves are opposite, small and crowded, and oblong to obovate shaped with a blunt apex and range from 2-4 mm long and 0.6-0.8 mm wide. The flowers are white in colour, and are small and numerous, being around 4-5 mm in diameter and borne solitary in the upper leaf axils.

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The mass floral displays found in the genus Baeckea, coupled with the general ease of cultivation, have ensured that a number of species are sought after for landscaping or for placement in rockeries. The tendency of a number of species to flower over summer when few Australian plants flower is also an attractive feature.
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