GBM On Demand – public transit at the click of a button. GBM On Demand is Microtransit service in Green Bay, WI. Download the GBM On Demand app today, book your seat and travel in Green Bay. Simply select your pick up and drop off location and one of our vehicles will come to you, using the latest technology to effortlessly match you with other riders heading in your direction! GBM On Demand service runs on Monday through Friday from 5:45AM – 7:45PM, and Saturdays from 8:45AM - 3:45PM. Late