Hi sgj,
Have had a look at the Early Annan census's for 1801 1810 1821. There are lots of GASS's in Annan but, only the following two families could be yours.
1811 census
Queensberry Arms :
James GASS jnr. & Spouse; John; George (manf)
1821 census - might be your James, but no mention of joiner.
BUTTS STREET
James GASS, Spouse , 4 sons 1 daughter
Didn't find a George GASS - flesher. Also had a look at the MI's for Gass in the Annan cemeteries, but to no avail. Perhaps they moved away from Annan.
The next time I am at the library I'll have a look at the birth microfishe to see if I can find any children to James and Elizabeth.
cupcake