Value of Goods in GTS for Free/Sample Order in ECC

Hi ,

We need to populate the statistical value in GTS when we have Free of Goods Order.

Currently system only consider Net Value and since Net value is Zero for these orders, Value of Goods shown in GTS is Zero.

Ideally we declare Statistical value GRWR to Customs even in case of free order, but how do we populate that in GTS so that the Value License also depreciate the same amount.

I am sure this is pretty standard scenario but not able to figure setup. Please advice .

Thanks,

Amit