Ron Paul would shutdown every US Military Post and Base everywhere in the world and bring all of our Service Members back to the Unites States. He would subsequently separate out almost all Military personnel leaving us at the mercy of whatever foreign force or faction that filled the power vacuum.
Isolationism had a terrible outcome several times in our past and would only have worse consequences in today's Modern World.
I don't think he would be able to. For example, 0bama was not able to shut down Gitmo, as much as he wanted to.
But you are right, he would certainly want to shut down all the bases on foreign soil.. not a good thing.