The better solution is getting a sparkie to install a male socket (with protective cover) for power inlet if you're anticipating needing a genset on any regular basis. While they're at it get them to also install an isolating switch so you can easily avoid backfeeding power into the grid while keeping the house powered.

You don't. You need an Interconnect and an "Inlet" port. You could use a male-to-male, but they're illegal and dangerous to the line workers.

Only if you like murdering utility repairmen.