From the link you posted: "In fact, it was Gupta’s career move that brought the newly married couple to Louisiana."
Establishes permanent domicile before Jindal's birth.
Note the similarities to the U.S. v. Wong Kim Ark ruling:
"...of parent of Chinese descent, who, at the time of his birth, are subjects of the Emperor of China, but have a permanent domicil and residence in the United States, and are there carrying on business, and are not employed in any diplomatic or official capacity under the Emperor of China, becomes at the time of his birth a citizen of the United States."
So, yes, via the U.S. v. Wong Kim Ark ruling, Jindal is a U.S. citizen. Is he a 'natural born citizen' for the Constitutional purpose of Presidential eligibility? Not necessarily.
From the article:
Gupta was accepted as a graduate assistant at Louisiana State University when she was pregnant with Bobby. Her husband, who at the time was an assistant professor at a Chandigarh engineering college, was concerned about her moving overseas in her condition. LSU offered her one month of maternity leave if she joined the program, a deal the Jindals agreed was too good to turn down.
They moved in January 1971. Bobby was born soon after, in Baton Rouge.
How does one obtain permanent resident status as a graduate student? I know of many brilliant graduate students who are here on Student Visas, not green card.
From the article:
“It is clear that the Jindal’s were only here for a few months before Bobby Jindal was born.”