The best replacement for gtr2 is rfactor.

The best alternatives to gtr2 are rated as following:
★★★★★  rfactor
★★★★  gtr evolution
★★★★  race 07
★★  lfs
★★  gtr evo
★★  iracing
★  gt legends
★  shift 2
  race injection
  nfs shift

Your alternative for gtr2 is not listed? Suggest!
Speaking about gtr2, one probably shouldn't forget about g25.

Other search terms related to gtr2 and their ratings are:
★★★★★ g25
You have in mind a companion for gtr2 and it is not yet here? Propose!



Google Trends

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gtr2
rfactor
gtr evolution