Are you unable to hide the Info Window on Page Load and don』t know where to look in the module? You are in the right place to help you find out the same.
Each Address of the Google Map module has the option to Disable the Info Window on Load.
To find the same just visit the individual Address of the Google Map module and go the Info Text tab.
At the bottom, you can find the option you were looking to Disable the Info Window on Load.