PPS The last variant, if you have a bit of room at the back, is to wheel the bike in backwards, just like normal.
Drop the bike onto its side stand.
Squeeze yourself between the wall and the rear wheel.
Grab the back of the bike (GS's are perfect) lifting the bike to vertical (it's not hard).
Extend your left leg to drop the main stand onto the garage floor.... then heave backwards.... pulling the bike onto its main stand. Job done.