Who was the current French president or PM at that time when Syria got its independence?

At the time when Syria gained its independence on April 17, 1946, the President of France was Félix Gouin.

What about Guadeloupe Martinique?

At the time when Syria gained its independence in 1946, Guadeloupe and Martinique were still overseas departments of France, and did not have independence. The President of France, Félix Gouin, was responsible for governing these territories as part of France.

And what about French Guiana?

French Guiana was also an overseas department of France at the time when Syria gained its independence in 1946. As with Guadeloupe and Martinique, French Guiana was governed as an integral part of France, and did not have independence. Félix Gouin, the President of France at the time, was responsible for overseeing the administration of French Guiana.