I just developed geographic tongue, will it be present for the rest of my life? or can it come and go?

Could be either: It can come and go, or be present from now on. Only the symptoms are treated. If there is no discomfort, nothing is done. The good news is there is nothing to worry about.

Hard to tell: True geographic tongue tends to be benign and not really cause problems. The reason for developing it varies from oral habits to just plain randomness. If you have habits like smoking, tobacco, heavy drinking, eating spicy foods, using harsh oral care products with alcohol, whitening or heavy flavoring, etc. These could all be potential stimulants. If pain is present, consult with your dentist.