Hi,
for many screens in IT0002, the gender field is hidden, because it is automatically filled in the background based on the form of address. So, if you pick "Mr." as form of address, the gender is automatically saved as "male" and available for reporting in the same way it would be, when captured manually.
So, you only need it, if:
- the form of address does not determine gender, because the country uses a gender neutral form
- you need a third value (usually "unknown" or "undeclared") to be available
In that case, try to set the gender key on "RF" (required field) in the screen shown in your post. If it's still overwritten by the form of address (it will probably bring a warning, if it doesn't match, but shouldn't overwrite as far as I remember) you need to pick a screen which doesn't have that logic - might be trial and error unless you know a country screen matching your requirements or someone else here knows the perfect screen for that purpose.