As others have said, this must be one incredibly steep driveway for a production car not to be able to make it up. There are some steep driveways in my neighborhood, actually, but I've never heard of a problem like that. Can you measure and post the actual inclination here, please?
In the meantime, the solution is simple. Everyone but the driver should get out and walk up the driveway, as they'd have to do anyway if you parked in the street. Then the car can still end up in the garage.
By the way, I was going to suggest trying to go up the hill in reverse, as for some cars that's the lowest gear, but it appears that for your car reverse and first have the same gear ratio.
I'm assuming you don't want to install a winch in the garage or install a turbo or a nitrous system in your car!