Just a few extra button pushes.. but that's not unique to the G1000. A 430/650 still requires you swap the CDI, AND, something that many forget is to ensure you've swapped the correct NAV FREQ into the nav box
This is one area where sometimes the little steam 1976 PA-28 renter is easier.. toss the frequency into the nav and DME box and follow the CDI / GS down.
The series of arming / activating / activating vectors-to-final / flying leg.. etc., sometimes takes away the spirit of what an ILS actually is.. just following a radio signal (basically) down to the runway