That’s not an issue if the garage is built higher than the bottom of the driveway. The concrete slab in front of the garage door should have a slight incline le

That’s not an issue if the garage is built higher than the bottom of the driveway. The concrete slab in front of the garage door should have a slight incline leading into the garage. The garage should be a few inches above the ground level. Drains where the driveway meets the slab can help too. Lots of homes in my area are constructed on inclines with houses on one side rising from the street and the other side declining from the street. With some basic civil engineering principles (water flows downhill) we don’t see any issues with water in basements or garages, etc.