From their site
"All Garrett AT searchcoils are compatible:
4.5" SuperSniper, 5" x 8" DD coil, 6.5" x 9" concentric coil, 8.5" x 11" DD coil, and 9" x 12" concentric coil."
They seem to think so. The AT gold is 18khz and runs the 5x8, the max is only 13.6khz
Excellent information,, I always got better results using the 5 X 8 in trashy areas.