The French centre-back is set to complete a £5.3million from Sevilla today once he has passed a medical at the Emirates.
And Squillaci, 30, claims the chance to link up with his compatriot was what sealed the deal.
He said: "If a French player receives an offer from Arsene Wenger, it's practically impossible to turn down.
"It was a sensational offer for me and I was happy Sevilla let me go. It was a difficult situation but I knew I had to take this chance.
"Now, I'm happy to have my name in the history books. For me, this is a great new challenge and I've gone there purely to be part of that.
"I don't think my age is a problem. My experience in football is great and players of my age tend to be at the peak of their playing career."