FYI, Gordon trained at Glazer's Unbreakable gym in West Hollywood earlier this year and the two became friends. In fact, Jay says he was texting with Gordon on Friday -- right before we spotted him out.
"I really do like the kid a lot," Jay said ... "addiction is a disease. It's hard."
Glazer is also tight with Lovato -- who has been open about her own substance abuse issues ... and has gone on to become a co-owner of a rehab center in Los Angeles.
Jay says he's incredibly impressed with the work Demi's CAST Centers does for people -- especially when it comes to mental health ... and strongly believes it could do wonders for Gordon.
Glazer even reached out to Gordon and offered to put the two in touch.
No word if he'll take Jay up on the offer -- but Gordon has said he does plan to get help somewhere ... a plan Jay fully supports.