How to beat King's Fianchetto Opening Modified (White) [fen "r1bqkbnr/ppp2ppp/2n1p3/3p4/3P4/6P1/PPP1PPBP/RNBQK1NR w - - 0 1"]


I have a few friends who I play with. Recently they have picked up on one of our better player's openings and it's surprisingly effective for development of the white pieces and positioning. 

I can't figure out how to beat the opening effectively. I need to be able to shut it down where it starts. This should be noted, the pawn that was moved to d4 is there to help develop the Queen. After this the next step for white is to develop the dark-squared bishop to b2, and after that to move the knight from g1 to h3. After which comes a king side castle. 

I'm unsure how to interrupt this opening other then to make an island on d5 and e6 to protect my rook. Is there any way to fully shut down this opening?

I know this opening relies on the bishops but I do not know how to get rid of them without suffering losses worse than gains.
You can develop your pieces pretty much any way you want and no big trouble can be caused to you by White.

However, I would postpone the ...e6 move, as your light-squares bishop gets blocked for no benefit (you could also try ...e5 with enough preparation). You may also want to break the center with a ...c5 push, so, although there is nothing particularly wrong with your play, my favourite move order would be 

 [fen ""]

 1.d4 d5 2. g3 Nf6 3.Bg2 c5!?


now forcing White to make a choice