Photo courtesy of reader IDJ:
Attached is an image of Nathan Road in 1949 showing the location of Gingles on the right.
Behind the trees on the left is what is now the entrance to Kowloon Park and the MTR station. The high rise with the clock was the HK Telephone building.
If you look at the pillars next to the second car from the right, you can see they have the word 'Gingles' written on them.