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This is not an Issue in FileMaker either.
Open manage | Value lists and create a new value list.
Select the specify field option and specify that genders::ID Gender be used for field 1 and genders::GenderNam be used for Field 2.
Now go to your layotu for members, enter layout mode and select the Gender field. Use the Data tab of the inspector to change the field from an Edit Box to a drop down list or pop up menu.
If you specify that this value list "show only values from second field" and use the pop up menu format, you user will not see the ID number and the Gender field will display the Gender name while storing the number.
If you choose to use the drop down list option, you can define this relationship:
Members::Gender = genders::ID Gender
and then you can place the GenderNam field directly on your member layout to display the selected gender name after the user exits the gender field. You can even put the two fields together so that they look like one field.