I have some 10-round mags for the Kel-tec 32 (GS1, I assume you mean regular-capacity mags with a finger groove?). They look silly sticking out the bottom of the grip, but they're more fun on the range.
If the grip bothers you, a number of members on the ktog.com board have put Bersa and NAA Guardian finger extensions on their KT mags. The Bersa are the easiest, with no modification being needed. Just about anyone who can adjust a holster can make the NAA mod needed.
I really like the Seecamp, but can only afford a P-3AT. Knowing me, I would carry the KT anyway, due to the weight of the Seecamp.