Tate McGucket first appears in "The Legend of the Gobblewonker," where he tries to discipline his father, the local kook, by spraying water on him. It was revealed that he and Old Man McGucket do not have a close relationship and have drifted apart, causing his father to construct the Gobblewonker robot to attract attention from him.
He next appears in the short "Tooth." He warns Dipper and Mabel about the bubbles in the lake water and told them if they see it, they needed to run. Dipper questions this warning, but Tate replies to get their camera out of the building.
In "Weirdmageddon 3: Take Back The Falls", Tate was freed and escapes with Manly Dan, Lazy Susan and the rest of the town's residents. During the end credits, it was revealed that Tate finally made amends with his father, Old Man McGucket, and starts visiting him again, as they are shown swimming in McGucket's pool at the latter's new home, Northwest Manor.
Tate appears to be young or middle aged man, with short, brown hair reaching down to the nape of his neck, covered by an olive green baseball cap. He wears his green baseball cap low; so much so as to obscure his eyes from view. He bears little resemblance to his father, Old Man McGucket, the only notable feature they share being a large nose. He wears a fairly simple uniform, consisting of a faded olive green polo shirt with a name-tag, a pair of brown pants worn unnecessarily high, held to such height by a black belt with a yellow buckle, and a pair of simple, black shoes with gray toes.
- In "Lost Legends", it is revealed that he guesses the correct Oregon State Lottery numbers every year but doesn't tell anybody.
- He scored so high on the SATs that the grading machine exploded.
- He has the ability to predict the stock market and weather patterns.
- 102. "The Legend of the Gobblewonker"
- 103. "Headhunters" (no lines)
- 108. "Irrational Treasure" (no lines)
- 109. "The Time Traveler's Pig" (no lines)
- 5. "Tooth"
- 207. "Society of the Blind Eye" (pictured)
- 219. "Weirdmageddon 2: Escape From Reality" (no lines)
- 220. "Weirdmageddon 3: Take Back The Falls" (no lines)
"If you see bubbles on that lake, kid, run."
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