"Gee winickers" is a playful and exaggerated version of "gee whiz". It's not a widely recognized phrase, but it's likely a humorous spin on the original, used to emphasize the speaker's surprise or excitement.
You might hear someone say "Gee winickers!" if they:
* Witness something unexpected or shocking.
* Find themselves in a particularly thrilling or exciting situation.
* Are playfully teasing someone about their surprise.
It's important to note that "gee winickers" is a made-up phrase, and its meaning is largely dependent on context. It's meant to be a humorous and lighthearted expression, and it's not used in formal settings.