Para verinmazsa gidmiyor.

He will not go unless him you money.

Thank you

Eğer ona para vermezsin o gitmiyecek. 

He will not go, unless you give him money.

(My try)

Hi Polygot, I wouldn´t have got that one either.

I think your approach, to conjugate ´go´ and put that at the end of the sentence was good.

You may be OK with gitmiyor, depending on the context but this is more like ´he is not going´ gitmeyecek is future tense.

I thınk ıts

vermezsen

[Eğer]  Ona para vermezsen gitmez.

He will not go, unless you give him money.

Are you also able to say, 

Para vermedikçe o gitmiyecek. 

Ya da

Para vermediğin sürece o gitmiyecek. 

Because of the (unless) in the English sentence. 

Yes, they sound ok too.