* Ireland would be first to adopt gay marriage by referendum * Polls indicate 'Yes' campaign win, turnout strong * http://link.reuters.com/qax74w * For Take A Look, please click on: (Updates with turnout, No side say signs positive for Yes) By Padraic Halpin and Conor Humphries DUBLIN, May 22 (Reuters) - Irish voters turned out in droves to cast ballots in a gay marriage referendum on Friday, with the high turnout likely to favor the Yes side seeking equality just two decades after the country decriminalized homosexuality.