$ go get github.com/cznic/mathutil
$ go get github.com/nakagami/firebirdsql

package main

import (
    "fmt"
    "database/sql"
    _ "github.com/nakagami/firebirdsql"
)

func main() {
    var n int
    conn, _ := sql.Open("firebirdsql", "user:password@servername/foo/bar.fdb")
    defer conn.Close()
    conn.QueryRow("SELECT Count(*) FROM rdb$relations").Scan(&n)
    fmt.Println("Relations count=", n)

}