take care; stay well
A warm, casual farewell used when parting from someone you may not see for a while. Often said to friends, family, or colleagues.
Well then, see you. Take care.
Even if you go far away, stay well.
ごきげんよう is an elegant, formal farewell used in polite or old-fashioned speech, while 元気でね is casual and affectionate.
From 元気 (げんき, 'healthy, well') + で (copula conjunctive form) + ね (sentence-ending particle). Literally 'be well, okay?', used as a set farewell phrase.