John Travolta didn’t hit the red carpet at last weekend’s Gasparilla International Film Festival (GIFF), but he did sneak through the back of Tampa Theatre to join a post-screening panel that followed his new film, “Cash Out 2: High Rollers.” Other stars like Lukas Haas, Natalie Yura, plus director Randall Emmett joined Travolta who even made it to the nearby Tampa Museum of Art for an afterparty. GIFF organizers estimated that about 400 people per day attended the six-day festival, with nearly 500 ticket buyers on Sunday…