The Metropolitan Police said officers were called to a disturbance at London's Ace Hotel in Shoreditch on Tuesday night before a 49-year-old man was taken to hospital.
A Scotland Yard spokeswoman said: "The man has been taken to an east London hospital where he remains in a stable condition."
Witness Alvin Carpio said Gascoigne, who has faced a long struggle with alcoholism, was kicked down the stairs after an altercation with another guest.
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Another witness posted on Facebook that it was "a shame" to see Gascoigne in such a state.
Gascoigne's spokesman, Terry Baker confirmed to the Daily Mirror that Gascoigne was treated in hospital for a head wound. Mr Baker added: "He hasn't been arrested. He's about to be released and sent home."
In September Gascoigne was fined £1,000 after pleaded guilty to racially aggravated abuse at his one-man show.
(Reporting by Neil Robinson; editing by Clare Lovell)
