When Gus is using the "hover technique" on one of the football players at the football facility, he is shown wearing the uniform of the training intern, aka a T-Birds polo and visor and khaki pants; however, when he meets up with Shawn in the next shot immediately afterwards, he is wearing his usual, in this case a yellow dress shirt and black pants.
The scenes inside the football stadium show the field having a 55 yard line indicated with a "C". American football fields midfield are 50 yards, and the field in the show is in Canada, where it was filmed.