Guys.. no of shares doesn't have an impact on difference in market cap..
Market capitalisation = number of shares x share price
So if AGO has market cap of $1.7B and GBG has $0.4B market cap, (and assuming what you are saying is that they should have similar market caps) then you can say GBG potentially has 300% to rise in share price.. but don't compare share prices, compare the market cap.