No they don't use the same daim. pump. The gp760 is a 144mm pump. You can go to Solas's website and look to see what other ski's use the impeller for yours, and look through parts diagrams to try and find the right nozzle set up.
That being said, look like the 97 760 & 1100 venture's share the same engine side drive coupler, and both have a 155mm pump. Looks like the fact. replacement Solas impeller is a performance replacement for the 1100 (more hole shot, less top end). Note that you will lose some performance that the gp has going with a 155mm pump on a stock engine.