Interestingly you can still easily find the Barcelona building where Gemma was involved in his last fight in The Return of Ringo.
If you copy a link to a web browser the current building “Can Sentmenat” can be seen. If you combine https://www.google.se/ with the rest of the link below it should work.
maps/place/Can+Sentmenat/@41.3790495,2.0909869,54a,35y,31.38h,60.32t/data=!3m1!1e3!4m5!3m4!1s0x12a4990982f5293d:0x44728d1efb0df522!8m2!3d41.3798309!4d2.0915085
The bulding matches well with Can Hospital here on Yoshi Yasuda’s very useful web site :
http://y-yasuda.net/esplugas%20city.htm
It can’t be very far from the nowadays nonexistent Barcelona western town Esplugas City which also was a location in The Return of Ringo.