I just put a small school of emerald eye rasboras (3) with an electric blue ram (1) in my freshly cycled brand new 10 gallon planted tank. They are loving it! In another week or so, I will add 2 or 3 more rasbora and maybe an oto.
IF you have planted real plants in your 10 gallon you can fit as much as I did. If you are going with plastic plants then I would put maybe 4 neon tetras in with your gourami