Hi
It is the one near College Green.
Checkout
http://www.old-maps.co.uk search for
College Green, Bristol use map number 6 as it is the clearest, I know it is later but there is no appreciable difference in the buildings compared with the earlier ones.
If you follow the map westwards College Green becomes Deanery Road and then joins St Georges Road.
This is close to Brandon Hill (a large open space, now a park) and the next road mentioned on the 1881 census is Brandon St.
On the census there are a lot of different households in St Georges Buildings so it looks like it was something similar to a tenement as they called them in Scotland.
It is always worthwhile going backwards and/or forwards through the census to find the previous roads on the census takers route.
In this case it is also very near the Turkish Baths
http://www.victorianturkishbath.org/2HISTORY/AtoZHist/Hammam/pix/BartsBristol_w.htmas that appears after StGsBldgs and before Brandon Hill.
You will see from the above link that the T Baths building location is now council offices and this link
http://maps.google.co.uk/maps?q=BS1+5UY&iwloc=A&hl=enshows you where it is (there should be a Green arrow head IDing it).
St George (No 's) is a totally different area of Bristol and would not have been in St Augustines parish.
St Augustines is the name of the large church on College Green (seen on the old map) and is now Bristol Cathedral.