Can we use Dgraph golang client with slash graphql?

	conn, err := dgo.DialSlashEndpoint("", "")
	if err != nil {
	defer conn.Close()
	q := `query{
	dgraphClient := dgo.NewDgraphClient(api.NewDgraphClient(conn))
	resp, err := dgraphClient.NewReadOnlyTxn().Query(context.Background(), q)

Can GRPC client be used for graphQL queries as well or this is limited only to DQL?

If not, then, is there any way to pool connection for graphQL queries?

No you can’t. If you want to use golang, you should generate graphql client using schema. Best choice is to look at GitHub - Yamashou/gqlgenc: This is Go library for building GraphQL client with gqlgen
You’ll get all queries and mutations according to your schema