Yes a Gunwale Hook Ladder for a g3....Can't get to mine but this is similar or exact. David on the GSG forum wanted a ladder for his wife so gave this info, thought some here might be interested?
Stopped by the anchor boat shop and saw a ladder like the one I used on my g3. It comes in 3 & 4 step but think mine is a 3 step? as the g3 is so low anyway. The Hooks that hang over the rail twist flat for storage as do the stand offs and stows nicely under the gunwale. The stand offs come packed seperate so you can position them correctly to the proper height just below sponson.
Note ( if you get a model of ladder with stand off legs fixed to one position it may or may not fit to the hull). Sorry I can't provide a pic of it on my g3 at this time with a model stepping up.
Garelick (eez-in) #05031 is the 3 step 36" X 15" for $49.95, (but see its $35 at the link below so + ship?)
the Hooks are 11" and theres a shorter reach one but think the 11" is whats on my g3, Mine worked well.
www.bizrate.com/swimming-pools-jacuzzis/oid2086390886.html