Nevin, who works for the club's media team, believes the centre-forward will now stay.
The Scot stated, "Just a few weeks ago I was asked a lot of questions if I thought Giroud would leave in January.
"But his amazing week now has given fans a lot of reasons to be happy.
"Now I think everyone knows the answer to the question of whether he will leave. There's no way Chelsea will sell him in January."