Sorry, I have to disagree with the SSR idea. The GT-1 has a stepped rim, and these show a smooth roll from the tire on back.
I think they're Cragar 247 series. I can't find them on the web, but they're in the July 1999 issue of Import Tuner magazine (the one with the TRD widebody on the cover). The magazine shows them with a black logo in the center of the hub, but other than that, they're identical. They seem to have a little hub cap which hides the lug nuts.