Usually when it return false is because there’s no value set on the post.
Can you double check that
1) your Map Field’s name is indeed called ‘google_map’?
2) the value is also saved properly?
3) your current post is indeed the post your are retrieving the value from? (do a var_dump(get_the_ID()) and see if the current post id is the same post id where you put the acf field)
4) make sure you are not mis-using get_field and get_sub_field (we all make this mistake form time to time đ )
Cheers
