I learned APL from that book in 1980. Great book. However, I now own a copy of the third edition of that book. It covers APL2! So, a few things:
1. Perhaps you can get a copy of the third edition since that better covers GNU APL (and all other APL's).
2. Having that whole book available online (not what you were asking) would be great, but would certainly require permission. Perhaps someone can investigate that.
3. Since the book in question is copyrighted, it is not legal to make the examples available. We need permission.
Thanks.
Blake