Once you update to CF03 the GPS is unlocked. All of the ROMs use .bin files meaning that the GPS is untouched so theoretically GPS should work the same with all CF03 Based ROMs and this has been the case so far.
As for your issue, try the following
Make sure that your GPS is enabled.
Once enabled go outside/ drive the car. A first lock can take a while- anytime between 1 min to 30 min won't be surprising. Afterwards the device should get a lock within 5 min (usually less than a minute).
Try it out, I would make sure my GPS is on and than go outside with a drink