On p. 325 of the English-language Mafia inc. book is the following:

From his cell in Brooklyn, Massino managed to get a message out to a man he trusted. He asked that man to travel to Canada and inform Vito of Vitale's treachery. In the end, however, the mission fell to a member of the Gambino family. The meeting was held in a shopping centre in Longueuil, on Montreal's South Shore. Fearing he could be arrested any day, Vito fled Canada two weeks later with his wife, Giovanna.

See Excerpt from p. 325 of _Mafia inc._ Although the excact date of the meeting between this Gambino member and Vito is not provided, it must have been held in February 2003, based on the context in the paragraph.

carmela, others:

Any opinions as to whether the Gambino Family member who was an emissary was an Inzerillo? Someone related to the Inzerillos? Would Frank Cali have been too high profile to have travelled to Montreal?

Please note that the word "member" might not necessarily mean a made Gambino. Recall that Mafia inc. was written in French and then translated. As well, Canadian organized-crime writers and journalists often use the word "member" generically.