R help - Jun 2013 - a title on the map (function gvisGeoChart package googleVis )

Hi
I am using the package googleVis and the function gvisGeoChart
Is it possible to put a title on the map ?

Here is the call of the function :

library(googleVis)
G1 <- gvisGeoChart(PaysProjets, locationvar=''Pays'',
colorvar=''NbProj'',
options=list(
region= "world",
displayMode="regions",
height=347*1.5, width= 556*1.5
))
plot(G1)
Thank you



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