Can boxer dogs live in an "inside outside area"?

I am thinking about getting a boxer dog, and have heard that they are supposed to be inside dogs, but could they live outside inside a building? Such as a doghouse? Or like an unattached garage? I used to have guinea pigs inside the garage. Inside the garage, it is a lot cooler than the outside temperature and plus, between the house and the garage there is a walkway, so i dont think it being outside would be to much of a problem.