Custom types in graphQL schema through api platform

Question

I'm using postgres extension POSTGIS and longitudeOne package in Symfony. So in my entity I have an attribute called coordinates which is a "point" type. But when I'm trying to get through a graphQL query a collection of entities, the attribute is not in my schema... The issue surely comes from the custom type but I don't find a way to make it recognize in my schema...

What I would like to get is

query
{
  destinations
  {
    collection
    {
     id
     coordinates
    }
  }
}

What I have:

query
{
  destinations
  {
    collection
    {
     id
    }
  }
}

And if I force the coordinates attributes, it says :

Cannot query field "coordinates" on type "Destination".