Place GO right before your Create procedure statement. The GO statement must be on a line by itself:
GO
create procedure add_Emp @EmployeeNo nvarchar(50),@EmployeeName nvarchar(50),@Address nvarchar(50),@Phone nvarchar(50),@Department nvarchar(50),@Gender nvarchar(50),@IsAvailable bit
AS
Begin
insert into employee1(EmployeeNo,EmployeeName,Address,Phone,Department,Gender,IsAvailable) values (@EmployeeNo,@EmployeeName,@Address,@Phone,@Department,@Gender,@IsAvailable)
end