Due to financial constraints a planned connection from the Tottenham and Hampstead Junction Railway to Gospel Oak station was not added until 4 June 1888, some 20 years after that railway opened, and then without a link to the North London line due to other companies' opposition.
In 1981 that passenger service from Barking was diverted from Kentish Town to Gospel Oak with the terminal platform rebuilt on the north side of the existing station.
In 1996, the line from Willesden through Gospel Oak to Camden was closed during conversion to 25 kv AC overhead.
All services at Gospel Oak are operated by London Overground using Class 378 and 710 EMUs.
The two brick skew arch bridges by which the trains cross Gordon House Road are shown in the cover photograph of the 1997 Gospel Oak EP by Irish singer Sinéad O'Connor.