You can fuse those two, but...
Importantly, Fuse Stance specifies that you "can't fuse stances with fundamentally incompatible requirements or restrictions (such as Mountain Stance and Crane Stance, which both require using only one type of Strike)".
Gorilla Stance also limits you to a specific type of Strike:
While in this stance, the only Strikes you can make are gorilla slam unarmed attacks.
However, Wild Winds Stance doesn't limit you to one type of Strike. There is also nothing incompatible about the focus point expenditure, since Gorilla Stance doesn't say anything like "you can't spend Focus Points" or "you can only spend Focus Points on spells with the Gorilla trait".
When you fuse the two stances, you'll only be able to make Gorilla Slam attacks. You will get the bonus to AC against ranged attacks from Wild Winds Stance though!
If you were to fuse something like Tiger Stance with Wild Winds Stance, you could freely use either of the Strikes they grant.