Search zip code or city name from web form to google map

I have an HTML simple web form to find a specific store in Google Maps by just entering the zip code or the city name. The search form must be targeted to the map like this:

https://www.google.com/maps/search/storename+cityname

Because people know they are going to get results of only Storename, they only write in the input text the zip code or city name so the store name is hidden but parsed after clicking to submit.

I am trying to achieve it like this:

<form action="https://www.google.com/maps/search/storename+city" method="get">
<input type="text" name="city"><input type="submit">
</form>

Any idea how to achieve this ?

Lets say the store name is: Apple
People will only enter the city name for example Miami (in the text field) and the form will in some way redirect the user to https://www.google.com/maps/search/apple+miami