  Gay and Meier asked if a trisection diagram for the Gluck twist on a spun or
twist-spun 2-knot in $S^4$ obtained by a certain method is standard. In this
paper, we show that the trisection diagram for the Gluck twist on the spun
$(p+1,p)$-torus knot is standard, where $p$ is any integer greater than or
equal to 2.
