Pilot 16
Don't even consider asking the examiner or taking one with you there is absolutely no need for a gps system in the cpl test .
I would be nearly positive if you did ask him he would so no anyway but like I said there is no need and while were on the subject I would advise throwing that thing away till you have your cpl and Ir under your belt anyway , don't want to be relying on it mate .
In my cpl test , the arrow was fitted with a gps and the only thing we used it for was the comms frequencies because its connected to the same box.
For the Instrument part of your test the examiner likes to see you have good knowledge of the use of you instruments like for position fixes use of two vor radials or 1 vor radial and dme distance thats all mate forget the gps .. flighttime.