GPS and BlueSMiRF?

(Crossposted from the GPS forum because it’s relevant in both.)

I’d like to build my own Bluetooth GPS, using a Copernicus DIP GPS module and a BlueSMiRF Gold.

The BlueSMiRF takes TTL input. I couldn’t find in the documentation for the GPS unit whether the output is at RS-232 levels, TTL levels, or something else.

Can I link these two straight together, or would I need a converter of some sort? Does a Roving Networks bluetooth modem need a converter? What’s the difference between the Roving Networks modem and the BlueSMiRF?