Kindly check the external module detection using lspci command.
iW-G27S platform supports “JODY-W263-00B” as onboard wifi module and it is tested with latest Ubuntu.
The on-board WiFi module “JODY-W263-00B” is exclusively supported via SDIO and does not offer PCIe compatibility.
To test our onboard wi-fi module, kindly refer our software user manual downloadable from the FTP link.
For further inquiries, please get in touch with mktg@iwave-global.com
Please find the detailed G27S product information in the below link,