Does geographic tongue eventually resolve on its own? i had it before as a baby than it disappeared for many years.

Yes: Yes it may take few months to years but it does resolve on it's own mostly.

Yes: Geographic tongue, by it's name, means that the area repairs itself, then another area becomes depapillated. Geographic tongue is a condition in which areas of the surface of the tongue lose the hair-like papilla and leave the surface of the tongue exposed. The papilla then grows back and another area goes through the cycle. Can be periods where no outbreaks occur.