Using to much oil on long trips 2004 gsx1400 suzuki

That is a lot of oil - is it blowing smoke? Is there any indication of where the oil is going?
The GSX engine is bulletproof - normally - and doesn't use much oil at all. I have serviced 35,000 mile bikes after 7500 miles and the oil has been spot on.
Looking on the net, it seems the 1400 is a bit vulnerable to oil-cooler damage. With an air/oil cooled bike this could be an indication of where the problem lies. The engine won't leak oil while stationary - well, maybe a drop... but when it is warm and under revs any hole in the oil cooler could be a direct exit point for oil. Look for stains on the exhaust headers - if you are driving and there is a leak, that'll be the first place the oil will go.
It would be the first place I would look - as well as oil cooler, pipes, connectors...
Run the bike for a while and try to inspect it to see if there are any leaks you can spot while the engine is running.