The EU itself probably won't exist much longer. The CIA gives it about a decade, hell even the French public is voting against it. Gotovina is no war criminal either, which is why you'll never see him captured. He also has many friends in the Pentagon and in Langley.
As to Gotovnia, he can remain free so long as Croatia is willing to pay the economic price of protecting him, rather than living up to it's agreements and obligations.