Hi Arko,
Two step process of creating/releasing the order and confirmation with auto GI/GR is the simplest standard process available. For one step process you need to develop Zscreen with input as Plant/Material Number/Order Type/Quantity and on execute in background as already experts suggested need to trigger the BAPI's to first create/release the order and then to confirm with GI/GR. Looks simple but it takes good time to complete the development and testing.
Thanks & Regards,
Ramagiri