What do you think of this 4.g4 gambit in the king's indian defense? I havent found it in any database so it has to be bad. But still, i want to know why. Do you think the positional advantage doesnt get to compensate the pawn loss? Also, I stopped there because i wasnt sure what was the best way to continue for both sides. To be honest I'm not even sure if my moves after 5.e4 are correct

I don't really like it. Black can just play 5...d6 protecting the knight and leaving d7 for it to run to after 6.Be2 Nf6 7.e5 Nd7. Black obviously won't be castling any time soon though.

you are right, i just missed 5..d6

As black I say thank you for the pawn