Have a read of these previous forum posts to see if they give you any help.
https://www.wix.com/corvid/forum/community-discussion/trying-to-connect-google-maps-to-dynamic-page
https://www.wix.com/corvid/forum/community-discussion/dynamic-item-page-with-google-maps
Wix Code Tutorial | How to Link Google Maps Using Wix Database Coordinates