BoxRec

OPBF Light Heavyweight champ Gary Hubble -- is he
still involved in boxing?

I have no idea

I recall him being sparked by Leslie Stewart many years ago. It seemed to happen in slow motion. Also, someone once wrote to KO magazine in the 80's wondering wtf Gary was doing in the top 10. But in those days an OPBF meant you'd receive a WBA top 10 rating

Does he have something to do with martial arts now?

Though his record isn't very good, he fought some pretty good fighters
and picked up a number of titles along the way.

Looks like he made a comeback in 1991 after being inactive
for 3 or 4 years as well.