....Never heard of that one.
"Gear" was very widespread in the 60's and indicated something that was really good.
Paul McCartneys brother Mike from the Scaffold even changed his surname deliberately to
McGear as a stagename because of that association.
By the mid to late 70's though its usage seemed to change, the word sound seemed to increasingly replace it in conversations, and gear instead was more often employed as a reference to weed when say asking if someone possessed any they were willing to share/sell with you as in "Hey La, got any gear?" though I remember it was also used by some as an alternative to clobber as in "Get out of bed softlad and get your gear on, we're off out in 5 minutes...".
As with so many of these words, they seemed to flit in and out of style and also change their meaning depending on your age group, the area of Liverpool and the context. I expect it's still very much the case.