Do servals live in groups? No, servals are solitary animals. There have been reports of the odd sightings of groups or pairings but it was found that they consisted of a mother and kittens or a mating pair.
Serval. Image by Raik Thorstad from Pixabay
That’s the answer and I nothing more to add except that the reference for this information is Wild Cats of the World by Mel and Fiona Sunquist who appear to have referred to A.A. Geertsema in The servals of Gorigor 1981. Gorigor appears to be a reference to Gorigor Swamp in Tanzania, Africa.