The Excals have alum inserts and weigh 360 gr. If your Gt's have the same, they will be real close. If the Gt's have brass inserts, they will weigh about 431 gr and you will have a couple inches difference in poi. All of this is assuming 100 gr tips. I much prefer the 4" vane and brass inserts. Don't know the current conversion rate, but I pay $34.50 per half dozen plus shipping. !0 pt sells the nearly same arrow thru Cabelas if you got one of them up thar.