Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Look at the NI page.
They offer the integrated circuits for GPIB.
Some of them can be easily connected to some mikrocontroller (PIC or Atmel) and you can attach the RS-232/USB convertor to the uC UART.
I am thinking about the development of the GPIB convertor for a long time. But I am not sure if I am able to write the Windows/Linux driver for it.