I don't have any experience with "Gyokko Ryu", but I've been doing WC for years, & based on what little info those videos provide I don't see any substantial level of similarity to WC.
WC is based around a few strategies:
1. It's punchy. Yeah, there's some pulls, throws, locks, etc., but those are mainly employed if the opportunity happens to present itself. WC would rather punch.
2. WC likes to stand square to the opponent and deliver attacks from the centerline to the opponent, and stresses occupation and control of the centerline. WC never wants to turn it's back on the opponent (even to deliver a throw, or some sort of grappling technique) - that would mean pointing your centerline at something other than the bad guy, which is a big no-no in WC.
3. WC likes to stick to the opponent until an opening presents itself. If the "bad guy" gets an arm in the way, WC doesn't want to step back or break contact - WC wants to either yank the arm out of the way & punch, or stick to the arm until the bad guy moves it himself & creates an opening for punches.
4. WC does chi sau to practice freestyle improvisation. Always. Chi sau is the vehicle for practice in WC, regardless of lineage.
There's more of course, but that's basically it in terms of what WC looks like. I didn't see any of that in GR.