A miniature version has been created for GP4, which we've recently used in the GPGSL.
In terms of the full version, the maximum track length available through GPxPatch is 20km (it was originally 8km but has been raised in recent iterations) - as the North Loop alone is 20.8km and the track in total is 28.265km, it wouldn't be possible unless further developments were made in regards to increasing the maximum track length even further.