Odometer Question

This is a stupid question but what the hell I know the speedo gets thrown off with a larger tire but does the odometer and how much going from stock to 32's then 33's and does it make it go down or up.

The reason is with the 33's now I noticed it said on my gps that I had 8 mile to destination and made it there in 7 could it be off that much or is it the gps

Stock 3.55 gears never changed the gear for the speedo.

The odometer is run off of the speedometer signal.

Go here: http://www.miata.net/garage/tirecalc.html

You can check how far off your speedometer is with whatever size tires you'd like.