I forgot to point you to the "diff":

https://ptna.openstreetmap.de/results/US/AK/US-AK-Anchorage-PTD-Analysis.diff.html#12445740

the four relations with 'ref' = 'GD' and closing the gaps

"PTv2 route: has gaps, consists of 3 segments. Gaps appear at ways: 'Whittier Branch' 8998220 ( iD , JOSM ) , 'Whittier Branch' 178863770 ( iD , JOSM )"

You can see this 'diff' in red at least until 3 AM 2023-03-29 AKDT - then the next analysis run might overwrite that.