So finally I found the solution 
, haven’t pushed it to native yet but it works fine as PWA.
Here are the steps:
1: Insert your Google map and create a group.
2: Fix the position of the group to bottom
3: Add a rectangle to the top of your screen view and set the fix position to top
4: Set the rectangle height to 0px and turn off the background colour
5: Set the map (not the group) to full height
