There is only one sharp in G minor: the F# in the harmonic and melodic minors. The key signature for G minor is two flats, so the answer to your question is pretty much zero. Its leading tone,...
For G Harmonic Minor: G, A, B-flat, C, D, E-flat and F-sharp. For G Melodic Minor: [Ascending] G, A, B-flat, C, D, E and F-sharp.[Descending] G, F, E-flat, D, C, B-flat and A.