The anus paintings are consistent with works done by Salvador Dalí, for whom the "Salvador Cauliflower Burger" special is named, and the Surrealist art movement.
Burger of the Day: Poblano Picasso Burger & Salvador Cauliflower Burger
Store next door-- "Attempted Crêpe: French Cooking School"
This episode was heavily changed in the re-write process. Originally, Gayle drew pictures of sunsets, not animal anuses.
When Gayle is painting the ground hog, the tune of 'My Heart Will Go On' plays with different lyrics. The real lyrics to 'My Heart Will Go On are actually shown on the subtitles.