Hi,
To add some tab or other content ; you need to put the appropriate HTML and Javascript into the view.
You can take a look at some HikaShop product page layout in order to get some samples.
For the Google map integration ; it's something not easy which requires a specific development (handle the API ; convert the address, perform the display, etc).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.