After I posted the L-Panel last week, I received an email:

Hello, Lavaloid.

L-Panel is not tolerated for GAPP guidelines on any circumstances. L-Panel is forbidden at GAPP. Meaning L tetromino is NOT allowed.

Please change your ruleset and your puzzle.

L tetromino is forbidden.

Thank you.

"L tetromino is forbidden"? That reminds me of a puzzle. Today's GAPP is an Anti L-Panel!

Rules: Divide the grid along dotted lines into groups of 4 cells. Every resulting region must NOT be an L tetromino, even its rotations/reflections.

Finish the puzzle in 0:45 or less for a Speedy Sloth 🦥!
Finish the puzzle in 1:30 or less for a Quick Crab 🦀!
Finish with any time at all for an Anti-L Tetraka 🐦!

Example (Penpa+): https://tinyurl.com/29twsmu6
Puzzle (Penpa+): https://tinyurl.com/26s2dr6a