It’s not a lot different to a gasoline engine. My shitty old scooter seems to need a refill every 100km or so, and the tank holds a couple of liters.
Anyway, it’s not really comparable. Electric drivetrains don’t work anything like internal combustion engines from an energy-use point of view. If you ride up and down hills a lot they’re a bit crap. If you’re on the flat, don’t accelerate aggressively, and spend a lot of time in rush-hour traffic, you’ll get a lot more mileage than you would from a tankful of gas.
Anyone know if Gogoros have regenerative braking?