I´ve found this on the Sherdog MMA forum. A woman named Jessica Elms wrote Gary was her uncle and he died on New Years Day 2018:
"Gary Elms is my uncle, he passed away on New Years Day. It’s all true about Gary and Bruce Lee. Growing up my dad, Gary and Bruce Lee were friends and since a child I’ve always heard stories of them together. Unfortunately a lot of people from that time have now passed away. Up to you all to believe it or not but I know for a fact it’s 100% true."
http://forums.sherdog.com/threads/bruce ... s.2934397/
(scroll down to the bottom)
This was Jessica Elm´s only post there.
Of course it´s impossible to say if she´s legit or not...
I am sceptical because of her statement "Growing up my dad, Gary and Bruce Lee were friends and since a child I’ve always heard stories of them together".
Those storys must have been 1958 and 1959, because Elms didn´t move to the US in ´59 but Lee did.
In Robert and Phoebe´s movie "BL - My Brother", it really looks like Bruce and Gary became like buddys after their Boxing bout. But who knows?