The image teaser of G-Dragon's new single, "그 XX" (That XX), has been updated with an "Above 19 only" stamp. The said rating grade is commonly used for explicit lyrics/content.
The single and music video will be released on September 1.
YGE then edited the info and replaced "Rated R" with "explicit lyrics"
EDIT: Apparently (BIG RUMOUR) YGE applied the rating itself
Source: BBupdate, YGlife