Lizeta, I haven't heard this phrase either. It might not be common. I would assume it means they are not technically qualified but they are "good" at what they do. Also, I wanted to correct your phrasing of the question. You would say instead : What does the phrase ____________ mean? I tried to translate the phrase but it doesn't make sense. :)

Gear is English slang for equipment. That phrase is saying not to focus on equipment or flashy accessories but use the talent you have. A Fender guitar will not automatically make you an excellent guitar player. The American cyclist Lance Armstrong wrote a book "It's not about the bike" essentially saying the same thing. Of course, in his case it was about performance enhancing instead.

I'm not familiar with this phrase either, but maybe it's saying even if someone has all the right tools/equipment (the gear), if they themselves aren't skilled (the talent), then they won't succeed in the task they're doing.