According to Osho, being 'in a gap' is the state created by taking the present for granted, postponing and dozing in awareness, until what is available is gone. Then the mind swings to the opposite pole: urgency, longing, chaos. The gap is the distance between presence and remembrance, opportunity and action, born of sleepiness, habit, and delay.
It’s when you ignore what’s here now and only want it badly after it’s gone.