Formal:
* રામ રામ (Ram Ram): This is a very common and polite way to say goodbye. It literally translates to "God is God" and is similar to "God bless you" in English.
* શુભ રાત્રિ (Shubh Ratri): This means "good night" and is appropriate to use in the evening or at night.
* જય શ્રી કૃષ્ણ (Jai Shri Krishna): This is a religious greeting, used by Hindus, that literally translates to "Victory to Lord Krishna."
* વંદે માતરમ (Vande Mataram): This is a patriotic greeting, meaning "I bow to the motherland," and is appropriate to use in formal situations.
Informal:
* બાય (Bye): This is the English word for "bye" and is widely used in Gujarati.
* ચાલો (Chalo): This means "let's go" and is a casual way to say goodbye.
* હુ જાઉં છું (Hu Jau Chhu): This means "I'm going" and is a more direct way to say goodbye.
* મળીશું (Malishun): This means "we'll meet again" and is a friendly way to say goodbye.
The best way to say "bye" in Gujarati depends on the situation and the people you are speaking to. If you are unsure, it is always best to err on the side of formality.