You really need to establish what your plant is, as there is another bush also known as 'Lantana' which is less hardy and would be best brought inside for the winter.
Please google some images to identify your plant.
Lantana is a small tropical shrub usually grown for its lovely colours and because it attracts butterflies.
They have started to appear in garden centres for short term, annual use in summer bedding displays.
However, they can be potted up and kept in a frost free greenhouse and grown on the following year. Keep it on the dry side over winter.