wanting to upgrade the rotors on the gs. cant decide which is better. slotted, drilled, or both. and also which pads to use with them.

 

I prefer dimpled and slotted.

 

Centric makes Stop-Tech drilled rotors for the GS, which work great on my IS. As for pads, what freatures are important to you? Stopping Distance, Brake Fade, Brake Dusting, Rotor Life, Pad Life, Quiet Operation, etc. There's always trade-offs

Good luck with the search.