Even if Shinsen isn't subbing anymore, GG is, I'm almost 100% sure, as they've stated at one point or another that they'd continue to sub even if Geass got licensed.

Besides, Bandai has only licensed the first season as of yet, so they probably won't license season two until they've either finished dubbing season one or until they've gotten a good number of the DVDs out and it's aired on television, so we're basically fine in that respect.