The garage of your home is more protected than a carport or driveway, but it's still far more exposed to the outside world than the interior of your home is, making it easier for ants to get in. Many garages also house extra food and beverages for the house. Some even have refrigerators and freezers with surplus food items like meat that takes up a lot of room. If you have food and drinks sitting out in the warm darkness of your garage for many hours at a time, you'll have ants at some point. Garage ants are particularly troublesome because there's a decent chance that the garage is a way into the home. And since many garages enter into the kitchen, it's important to keep ants at bay.