Translation:Teşekkürler. Hoşça kalın!
You say "güle gûle" to someone who is leaving. It means something like "go happily." You say "hoşça kal(ın)" to someone who is staying. It's like "stay (here) well." But what if you're both leaving someplace you met up at the same time? I'm guessing you'd both say "güle güle" or maybe something different, like "görüsün(üz)."