Gap up or Gap down. You must be clear about your statements. And gappers are not good unless you plan on dumping into the gap. Why is a gap not good, because if a stock gaps up or down, it's almost (like 99%) positive that the stock will come back to cover the gap within a month, depending on size of the gap. Most gaps are covered on the same day.
If enough people believe that this is the start of the run, yea, it could happen. Like a self fulfilling prophecy. If good news hits soon, it could be sustained. If not, it would probably drift back down.