Get the Gringo [Blu-ray]Amazon. com Mel Gibson's comeback continues with Get the Gringo, an agreeable action adventure featuring Gibson in the title role. The disgraced actor (he also cowrote the script) has very few friends on the Hollywood A list these days, so it's not surprising that he is one of the few known commodities associated with the film; nor will this be remembered as one of his finer efforts. But it's still an enjoyable ride literally, as the opening shots