Geartronic is an Automatic transmission, with the opportunity to switch (or
better "pre-select") gears, used by the AT. Sure that the AT does not accept
a 5th speed while starting or the 1 at topspeed. Being in Geartronic-modus
the AT still switches up and down, if the machine thinks that it is time for
a change...
A manual ist a manual transmission, with a clutch, eg....