Tenement of Robert Drope in parish of St. Botolph without Bishopsgate together with garden gate and chamber above called "le Gatehouse," 1491 (Ct. H.W. II. 592).
No later mention.
·noun A house connected or associated with a gate. ...
Webster's Dictionary of the English Language
Mentioned in Strype, I. i. 269 in a bequest to the prisons of London. Qy. = Newgate, not otherwise ...
A Dictionary of London by Henry A Harben.