All gear is in sets of 34, since the first DLC was released... To see what I'm talking about, try to choose "Fill" or "Compact" as a view mode.
Have in mind that when the gear section at MyGT was created, there were only 8 sets of gear with 30 pieces each (4 sets of helmets and 4 sets of suits), which I think are the ones you call "standard".
One of the patches added the majority of the remaining sets, the ones of which MyGt has no images, referred in MyGt as Collector's Gears, or something like that, and they also had 30 pieces each.
When DLC was released, a few new sets were added and ALL sets had 4 more pieces added to them. 30+4=34!
So as of now, all the gear sets have 34 pieces and are considered "standard", as all of them can be won from races, as opposed to the "special" DLC gear, which includes the Stig's Suit Helmet in White and in Black, NASCAR gear and WRC gear.