I have this function
@GET(\"/users?filters[0][field]={param}&filters[0][operator]=equals&filters[0][value]={value}\") UserDto retrieveUsersByFilte
Query params have their own annotation which automatically appends to the URL.
@GET("/users?filters[0][operator]=equals") UserDto retrieveUsersByFilters( @Query("filters[0][field]") String nameFilter, @Query("filters[0][value]") String value);
You can read more about @Query on its Javadoc
@Query