Heres the only spec info I can find for zuk springs and im guessing these are for ironmans lift springs, not stock sized springs.  If you notice their XL7 springs are the same diameter as the GV and 4cyl springs just longer. Thats leading me to believe the stock XL7 springs would work on my 2.0L and maybe give it some lift. I guess the only way to find out how much would be to measure the stock clearance, change springs drop it and measure the new clearance if any!  Since im making my own spacers I will just cut them to whatever size is needed to keep the front end from going over 2" that might help for getting to much lift like beercheck.

http://www.ironmansuspension.com/suzukigrandvitara.html
(find the part number then match it on the spec chart)
http://www.ironmansuspension.com/specscoilspringss.html

well that's good news, try'em out!