However, there are some instances where squirrels might gather together, but this wouldn't be considered a "group" in the same way that a pack of wolves or a herd of elephants is.
Sometimes you might see a "dreys" which is the name for the nest of squirrels. This is a structure built by the squirrel, often in a tree, that can be shared by multiple squirrels, but this wouldn't be considered a social group.