Call SAP GUI out of UI5

Hi experts,

is it possible to call the SAP GUI (not web gui) out of SAP UI5?

I want to call a transaction in the installed fat client of the current pc - if no fatclient of sap gui is installed call the webgui.

I also do not want to relogin at the sap gui - call transaction with parameter directly.

Thanks for information.

Best regards,

Christoph