Jim,
If I were you, I would put a new original Mopar filter back on the GT Cruiser and then pull it and inspect for more shavings at 600 miles. That seems like a lot of metal in your filter, even for a new motor. If you get more shavings, take both cut up filters and the pictures to the dealer.
When the dealer tells you that this condition is normal for a new motor (not reasonable to me, but somewhat likely for them to say this), then make sure that you inform Chrysler in writing and send them both sets of pictures. I would use certified mail for this, just to let them know that you are serious about reporting your concerns.
I have a 2003 GT Cruiser, which I bought in early October 2002. It now has 12.9K miles on it with no problems, other than sort of poor gas mileage for the amount of power it makes.
When my 03 Cruiser was new, I did an oil change at 350 miles, pulled the oil filter and cut it open for inspection purposes. I did the same thing at 800 miles and 1800 miles. Again, no particles in the Mopar filters. At 1800 miles, I switched over to Mobil 1 synthetic and a Mobil 1 filter. Due to the high heat of the turbo bearings, I would strongly suggest synthetic oil for your GT Cruiser.
I put a magnetic plug on my Cruiser at the first oil change. It was a Napa P/N 704-1370. It cost about $4. You can get much stronger magnetic plugs for the Cruiser at:
www.superplugs.com
www.magneticdrainplugs.com
So far, nothing metallic on the magnetic drain plug. I am going to get one of the stronger magnetic drain plugs from one of the above sources.
Good luck with your GT Cruiser and keep up with your filter analysis!
Steve