Yes, you can use 1 GFIC for both plugs, the requirment is that both plugs be protected. Attaching the second plug to the load terminal is the way to do it....
THat being said, I gernerally put in a GFIC on each plug. The reason being that if there is only one GFIC when it trips the entire circuit goes dead, at which point I get a call and have to drive across town to push a reset button. Whereas if there is a GFIC in each plug the instalation cost is significantly higher, but when one trips the client or tenant will try and press the reset button themselves before calling me. And if it is only one plug that has failed it is not an emergency and I don't have drop everything and drive across town to press the reset botton....
My last recall working for the large plumbing company was where I had cabled the kitchen line. A few days latter I get called back out on a costomer complaint because now the Garbage Disposal (GB) does not work. Garbage disposal was on the same circuit as the counter plug which had tripped, $20 in gas out of my pocket, with no compensation....
Michael