That's absolutely a voice she recognizes, Blondie herself turning towards the voice with a cookie in her mouth. There's a noise of frustration at the cookie, Gwen dropping it back into her mouth and swallowing the bite before shouting back.

"Mr. Stark!" And yes, she is in fact running over at full tilt for the hug. Don't worry, she's holding back her spider-strength. It really wouldn't do to knock her father-in-law over, would it? Even if she is ridiculously excited (and actually showing it!)