@dermmanninderhochburg On G1 its pretty standard to attack 110. Probably 111 and 106 are hit too. That doesn’t impact on the Gibraltar move. The navy that goes to Gibraltar is from the med and the cruiser in 91 and the destroyer in 109. The bid effects this too as it may mean there are more British ships that can join. An airbase is built at Gibraltar and UK air is landed there as well.
The advantage of this is 3 fold. 1 you contain/threaten Italy (without sacrificing ships) and discourage an early attack on Egypt. 2 you discourage a G3 sealion and threaten a landing in Normandy, etc. 3) you have a waypoint that allows you to shuttle air quickly from the Atlantic towards the mid east and then Moscow. And you have 5 air that can make the move there on the next turn.
The strategy that you describe works sometimes but will probably run into trouble when you play people with more experience that can anticipate it. If you don’t win the game by G/J5 you have probably lost it. And the US can afford to lose WUS for a turn and if Japan forgoes the money islands it will soon find itself being dramatically overspent and pressured on all sides. So I think this can sometimes be a fun strategy to try on an unsuspecting player, but not one I would rely on.