18kGE could possibly mean one of two things: 1. 18K gold Electroplate or 2. the GE could be the initials of the person who manufactured the ring. My recommendation would be to take it to an accredited jewelry appraiser who can help you determine whether the ring is real or costume.
When I see a marking of GE, I am careful to buy the gold. The manufacturer may have left off a "P" from the end which would make the gold "gold electroplate", which is not real. They may have also left off a "H" from the beginning which would make it "heavy gold electroplate", which is also not real. I would take it in and have it tested. That is the only full proof way of knowing. Thanks.Gods Blessing & Trying to figure out Real or Not ? Thanks Steve,Ky