grob's attack is one of a number of dubious openings i use because i enjoy having to solve the difficulties they create.
white is not automatically lost unless he tries to win on the white squares with that gambit.
basman showed one way to play it positionally; i would like to see others (e.g. that 2.e3 variation). what is not automatically obvious about irregular openings is that, provided one has defensive knowledge & a bit of luck, even better players will not be able to overrun your weird set-up unless a blunder occurs; meanwhile, there are opportunities for the other player to misunderstand what's going on, due to lack of experience against nonstandard things...
Oh yeah thanks I was wondering about that