"Memnun oldum. Hoşça kalın."
Translation:Nice to meet you. Bye.
Güle güle is said to someone leaving BY THE PERSON STAYING. It means "smilingly/laughingly/happily" and is short for "Güle güle gidin" -- so it's like saying "Go forth from here happily!"
Hoşça kal(ın) is maybe slightly more often said by the person who leaves (not a hard rule, though--can be said on the phone, or when two people part, or even by the person staying). It means "Stay nicely/well."
Hey ich bin deutsch türkin ich finde diese app richtig aber aber nich das alles auf englich ist^
we went to turkey for two years but that was about 7 years ago but i forgot most of the language, i dont ever remember that phrase