The song title is an acronym for 'Girl Under You.' Gaga revealed to Stylist that she wrote this tune as a "new-age feminist" and explained that the track deals with embracing the female image. "Any kind of feminist has valid views for herself about what it means to be a feminist, but, as a new-age feminist, I would say I quite like the transference of strength I feel by submitting to a man – being under him," she said. "I actually wrote a song about it on my album, it's called 'GUY' and it stands for 'Go Under You'. So wearing make-up, smelling delicious and having suckable, kissable, edible things between your limbs is something I find strengthening because I know that when I pick the right guy, I can let him have it."
The song's music video was filmed at Hearst Castle, the former home of William Randolph Hearst located near San Simeon, California. Clocking in at 11 minutes, 46 seconds -it exceeds Gaga's nine-and-a-half minute clip for "Telephone." Andy Cohen and The Real Housewives of Beverly Hills stars make cameos in the hedonistic visual, whilst Gaga herself is listed as the director. "You have to [crack the whip] to keep the pace going," she told MTV News. "We had our work cut out for us with this video. It was a very big production. We shot for six days."