How to exclude STOs from GATP, when we need to ship the "Customer return" products from branch to Central DC?

How to exclude STOs from GATP, when we need to ship the "Customer return" products from branch to Central DC?

We have to set up a scenario for sending "Customer returned" products from branches to Central DC through STO. But we do not want GATP check for these STOs, as they are Customer Returns, which need to analyze at CDC for further actions. We are using SCM 7.0 and ECC 6.0

Thanks in advance,

Ravi