I used this opening a couple of time and I had my share of wins. I like also playing it with black, (Borg defense, also called Basman defense) 1- e4 - g5 2-d4 - Bg7. That's about the same lines. I often draw and even win a little with black...
How have you had your share of wins? Anyone familiar with this opening would crush you without trying. All black has to do is play c6 and your entire gambit is pointless.
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...