Congrats, fellow GS F owner! Not sure how many members here own them, but you'd be one of just 141 in Australia 🙂
1. After some 9 years after its introduction, the Enform app finally works smoothly with Lexus infotainment systems. That said, I'm sure Android Auto offers more. Check out Lexart Australia on Facebook - they're based in Seven Hills and import Lexion units from Korea that integrate with your GS's existing wide-screen display.
2. Lexart Australia also offer TOM's, Novel Racing and Apexi exhausts.