How to pass specific value to the converter parameter?

Try using x:Static markup extension:

<RadioButton 
        Content="Female" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter={x:Static model:GenderType.Female}}"/>

OR, you could just pass a string and use Enum.Parse to convert that string to the enum type in the converter:

<RadioButton 
        Content="Female" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter=Female}"/>

–

GenderType gender = (GenderType)Enum.Parse(typeof(GenderType), parameter.ToString());