I googled Alberto Gonzales and didn't find anything to link him with La Raca. Found one decision concerned parental rights in Texas I didn't like. But nothing that should prevent him for being Bushs AG. I could not find anything about his views on illegal immigration. I imagine he will enforce the law as best he can given the resources he's got.
I do not expect any changes in our open borders policy, given that Bush favors such a policy. The battle over open borders is best fought with the man responsible for our open borders policy, President Bush, not the hired help.