Thanks for the link
gearbasher . Looking through the pictures, I have to revise my statement. While many BMX bike, most notably Mongoose, used a looptail rear triangle, GT used straight tubes. They did extend the top tube beyond the seat tube, but the seat stays attached to the top tube aft of the seat tube.
This one has me scratching my head a bit. Some things, like the headtube graphics, the configuration of the rear triangle and what looks like a skinny (and maybe flattened) down tube don't look like typical GT frame styles.
I'm with
Trakhak though, rather than trying to identify exactly what you got, ride it if you like it and upgrade what you don't like or keep an eye out for something else. I rarely, if ever see a 26" bike from the BMX era. It is interesting to note that Bike Boom bikes can be easily found, but BMX bikes from a decade later are rare.