I would like to drive the GAZ4 Display through a USB port without using a USB>Serial Cord. I know which USB wires are power and ground. Could I experiment with the two signal wires and ground or am I going to explode my computer?

USB >Serial adapters are reasonable in price and are a known solution. Feel free to potentially damage your PC if you want though. Please let us know how it turns out.

Does that responce mean USB to Bannana plug is known to be bad? or just never attempted?

Never attempted.

...please go and buy yourself a usb to serial converter. some are as cheap as $9 (USD)

USB directly to the GAZ4 did not work. I was later told by our IT department that USB will not usually work over lengths greater than 8 feet.