@Nadeshot It could be a custom order from Taylormade’s “MySpider” program on their website. They used to offer customization for the GTX but no longer do.
It could also definitely be tour issued.
@GolfSpyT@Titleist I prefer no markings or “alignment aids” on my driver / fairway woods. Really wish manufacturers would stop advertising on the top of the club head. I know I bought a GTS, I don’t need to be reminded every time I look down at it.