It doesn't look too bad. You do want to check the alignment before doing anything. Snug the wing bolts down and check. If it is where you want it, you can use some epoxy mixed with microballoons to fill the gaps. Put the mixture onto the wing saddle. Put a little glad wrap on the wing to protect it, then put the wing in place on the wet epoxy, re snug the bolts and wipe away the excess. Let it cure. On the other hand, if the wing alignment is off, then sand the saddle a little to correct it. The epoxy adds a little weight but will fill the gaps if they bug you.

peter