The reason you got that response is because people have been talking about GameStop's decision to stop allowing purchases of gift cards with credit over that last 20-30 pages.
Edit: You can still buy most PSN, Xbox, etc stuff though.
I didn't think his response of a simple "no" was a bad response. It was a "yes" or "no" question. And I really did appreciate that he responded promptly with a good answer.
Depending on your settings, a few pages back the thread was reacting to non-gaming gift cards no longer being eligible to be purchased with trade credit.
Again, I didn't think it was a bad reaction, and I appreciated his answer. I knew that gaming gift cards were still allowed. What I was trying to figure out was if I could just put the credit on a GameStop gift card instead of a trade card since I might want to use the GameStop gift card to buy a non-gaming gift card in the future. But I see that GameStop has gotten paranoid as of late that people won't buy anything in their stores anymore.
I'm probably still going to dump my extras while the bonus is on since I need to thin out some PS1 and PS2 games. But thank you everyone for replying and providing useful information.