If the connectors in the back are the same, then it must be the same.
/me rolls on floor laughing.
I don't think it will work. The Probe has got some different electrical stuff, so it probably won't work. If you have a spare ECU and CPU, then you can give it a try, in case anything burns out.
I think the Probe GT's had a Boost gauge built in, it'd be nice to have something like that.. .
If it works, that'd be really cool. Since my car has a salvage title (minor front end work), my milage is "inaccurate", so I could legally do dash switch... I'd love to have a built-in boost gauge...