GPS-Gift?

My parents are the hardest to buy for so we are having a hard time deciding on a gift for them.
My mom said just the other day 'maybe we should get one of those' in reference to my GPS.
Is this an appropriate gift to get them for my wedding? I've already purchase some personal items too.

I would go for it. I got a Garmin Nuvi for my birthday yesterday and we have already used it so much (we went hiking 2.5 hours away and just driving around town).

I love it!