Around a dozen officers were involved in the search in Glasgow's Saltmarket during last night's televised European cup clash between Celtic and Spartak Moscow.
It came as police released CCTV images while his family made a renewed plea for him to get in touch.
New CCTV images were released of George, 43, in McKinnon's public house on the Saltmarket around 2.40pm on Tuesday, September 18 – the day he was last seen.
Officers last night spoke to football fans heading to pubs in the Saltmarket in the hope of gleaning new information.
They focused on the area around the Tolbooth bar, McKinnon's bar and the Spirit bar on London Road between 4.30 and 6.30pm. George was last seen on CCTV at the Spirit bar.
A statement from his family said: "George, we all love you, and we miss you. Your children and your grandkids really miss you too and want you to come home. Please contact us".
George relies on daily medication which he does not have with him and he had recently moved to the Shettleston area to live with his sister.
He is described as 6ft 4in, medium build, with short grey hair and a moustache. He is also partially sighted, with an artificial right eye.
Superintendent Steven Reed of London Road Police Office said: "As time passes we are becoming increasingly concerned about George's wellbeing. He requires daily medication and we know that he has not taken this with him.
"We know he has access to a mobile phone but no contact has been made to any of his family members.
We also know that he has access to money but has not used his bank cards."
Owen McArdle, 51, from Hamilton, is a regular at the Spirit bar and remembers drinking with George in the pub.
He said: "He was a very nice person and he was always polite. He was a very quiet man but he bought me a drink."
Gorbals man Kevin Duncan said he would often see George in the Tolbooth bar for Celtic games. The 26-year-old said: "He was always smartly dressed.
"It's a shame he wasn't here for the game."