The
USCG and USN Flower-Class corvettes all served in the Atlantic and Caribbean.
As to the USCG Cutters in WitP I can say that they were not that well researched. Only one Treasury Class cutter, the TANEY, started the war in the Pacific: not 3 as in CHS. It transferred to the Atlantic at the beginning of 1943 with a armament scheme and profile unique for its class and then back to the Pacific at the beginning of 1945 as an Amphibious Command Ship. Several of its sisterships also entered the Pacific in the same time frame (1945) configured as AGCs (they all got configured as such but not all actually went to the Pacific before the end: BIBB and INGHAM certainly did).
One of the other 2 (Taney Class) included in CHS, the HAIDA, was sort of a scaled down Treasury Class (knock off 75 ft, a few 3" guns and a third of the speed and it's the same ship though). The other (Taney Class) in CHS, the ONONDAGA, was only half the size, with half the armament and half the speed of a Treasury Class cutter. In any case all the stuff about all the pre-war USCG cutters is in a thread from about 6 months ago including data about speed, endurance, armament and refits.
I might add, and not just from picque, that the USCG experience in night and day ops seems a bit low (20s to 40s). Unlike the Navy, the USCG actually has a real job in peacetime. Not only that, the USCG took over some USN ships in the 20's to fight "The Rum War" and so actually had more recent "battle" experience than either the USN or the IJN for the type of things that PGs and PCs do.
A listing of every USCG Cutter ever and every USN and USArmy ship manned by the CG during WWII along with photos and a synopsis of service (more or less detailed depending on ship) can be found at:
http://www.uscg.mil/history/
under "Cutters and Craft"