It makes so much difference what bike you had before as you now have 2 big pistons that make a 2 big bangs at the tiniest of throttle openings and transfer a dollop or torque to the rear wheel resulting in a lurch forward. The engine braking when you shut the throttle will make it jerk in the other direction. If you've been used to a multi, especially a small sports one you will have been used to opening the throttle a bit from tickover and nothing much happening apart from a bit more noise out the back.
Yes a new GS bike can be jerky, as will any big twin, especially if the throttle balance is off and this will be more common with a new bike until the cables and whatnot settle down and a throttle body rebalance lasts longer than a 2000 miles or so.
In essence you need to:
1) develop sensitive throttle control at low speeds in low gear
2) be patient with the bike until it's done a few thousand miles
3) keep the throttle bodies balanced
4) do the TPS reset once in a while (do a search)
5) get used to running in higher gears than you may normally think of using in traffic, you can plonk along in 3rd or 4th at 2000 rpm or less with no problem which will lessen the effects of sudden small throttle changes