Do the above definitions mean that we can use the {gho} for any kind
of ring-like circular object ? For example could we write the
following ?

SIyechmey pochHa'pu'DI', SIyechmeyvamvaD Dojmey mojmoHmeH wIjwI'pu',
ghomey lo'pu'
as soon as they unplanted the canes, the farmers used hoops to make
bundles out of them

Yes, you can use gho to refer to any hooped-shaped object. It doesn't only refer to the abstract shape. The phrase vIHtaH gho the hoop is moving (KGT) refers to a physical hoop rolling, and the term gho paq binder references the physical rings that hold in the paper.

-- 
SuStel
http://trimboli.name