The combative midfielder on transfer deadline day sealed his move to the Gunners.
This was after the Gunners invoked an automatic transfer by paying the full buyout clause of £45m for the Spanish side Atletico Madrid.
The 27-year-old has signed a five-year contract to end months of speculation over the move with an option to extend for another year.
In an interview with Koforidua based Bryt FM, he said, “Partey moving to Arsenal comes with great joy. I’m sure he is going to deliver for the club. He will be an integral member of the team and command the midfield as well for the team.
“I cannot wait to see him in the Gunners jersey because I’m optimistic he will sure shine. His best is even yet to come. I will plead with Ghanaians to pray behind him and other Black Stars players” he said.