NES
D-pad
NES Zapper
ROB
Super NES
Mode 7
Nintendo 64
3D graphics
GameCube
Second analog stick
NES. Well the Dpad was a ginmick that became industry standard.
SNES. i would say the ginmick in this case were the R & L shoulder buttons. A funny anecdote that you might have experience yourself if you are from that period in gaming or know someone that was an avid videogame follower in that era, is that at launch gamers that owned other systems defined the bumpers as a ginmick because using the thumbs was far better to push a button.
As well, became industry standard.
N64. 3D grapics are not a ginmick. Actually there are many ginmicks with the N64:
First one is bringing back a thumb operated analog stick, i don't recall if it was the first self centered thumbstick. We' ll have to check the Vectrex.
Second one, is the modular design. The controller can accept modules. Transfer pack, rumble pack, mem pack and at some point a screen was planned.
Third one, the 3 prong design and control options for lefties in several games. This wasn't executed well enough.
Fourth one, is the rumble feature in games.
All the above, except the 3 pronged design became standards. Second one, i would say mostly.
GameCube. Is not the second analog stick, that was more or less stablished by then. The ginmick were the hybrid digital/analog triggers and later the Wave Bird wireless controller.
The Wave Bird was showcased in the GC unveil, i don't know why it took several months for Nintendo to release it. This company is weird like that XD