Using a direct First Great Western service from London Paddington the journey takes approximately 1hr 56mins.
By road Gloucester is about 112miles from London.
Not directly, you have to go to the train station in London Paddington and take a connection train from there.
Train: Earley to Reading Train: Reading to London Paddington Underground (Circle line): Paddington to Gloucester Road Underground (Piccadilly line): Gloucester Road to Hyde Park Corner
There is no Gloucester city in London. Gloucester is about 100 miles west of London.
The best route is to take a train from Gloucester via Birmingham New Street to Cambridge.
Google Earth cites the shortest distance as 164.8 Km.
50 mins by train
You will have to take the Heathrow Express (or the Underground) to Paddington Station in central London. There are direct trains from Paddington to Gloucester, usually you will need to catch a train bound for Cheltenham.
About 1 hour.
It would take about 2 hours and 17 minutes long to get to Gloucester from London by road. The actual distance is 112.5 miles.
There IS a street by the name of Old Gloucester Street in Central London, but the rest of the address doesn't sound right - beware, it could be a scam.
It varies between 24 and 53 minutes depending on which train you catch.