most likely, but I haven't seen many/any TdFs for the US market with those exact Simplex DOs, they usually are the other style (with "horns" and thicker material) or even very occasionally Campy 1010A, but since it's Gitane ANYthing is possible, including that this was for a non-USA market.
That fork may be a Tange especially with the 105 HS, but from that pic it also reminds me of an 80's era Motobecane fork. Pull the thing out and see what the steerer says, or just if the HS washer has a "tang" of a "flat" to mate with the steerer.