Hi there,
Thanks to everyone for the ongoing help on this. Up until last summer, I lived very close to the actual location of both the Old Man's Asylum and George Street (as Skoosh says, they are very close) - most of my family haven't really moved that much for the past 150 years

- so I am familiar with the housing of that time: even in the 1950s, my family were living in single-ends or 'room and kitchen' accommodation. Having said that, I don't think he'd have simply moved out.
As I mentioned previously, I deliberately held back info on my family so as not to prejudice anyone (least of all myself) but suffice to say, I think it more likely he was thrown out. When he died, he was listed as single (although still married) and his death was certified by an English niece (despite the fact that his family were only a couple of streets away).
In reply to Stewart - the family name was Chambers. My GGG Grandfather was Daniel and he lived at George Street (certainly up to the 1891 census) with his wife Agnes and their children. 82 George Street would have been quite densely populated. If you look at this image of the 1913-14 valuation roll for the property, you can see how many tenants (both domestic and commercial) at that time -
http://www.theglasgowstory.com/imageview.php?inum=TGSV09039Cheers,
Clare