Answer based on context:

With the exception of the elected Representatives, so far there has been only one Armenian-Cypriot MP in the House of Representatives, Marios Garoyian. He was elected as an MP for Nicosia District on 21 May 2006 with the Democratic Party and in October 2006 he became the party's President. After the election of Demetris Christofias as President of the Republic of Cyprus in February 2008, Marios Garoyian was voted Speaker of the House of Representatives on 6 March 2008, the second highest political position in Cyprus. He was re-elected as an MP for Nicosia District on 22 May 2011 and he served as House Speaker until 2 June 2011.

How many months after being elected as an MP was Marios Garoyian appointed the party's President?
5