The United States immediately recognized the new Gabonese Republic and moved to establish diplomatic relations.

The new U.S. embassy in Brazzaville, Republic of the Congo, had been established two days earlier on August 15.

The current resident in Brazzaville, Alan W. Lukens, was commissioned as a Chargé d'Affaires ad interim to Gabon and presented his credentials to the government on August 17, 1960.

During Blanke’s tenure as non-resident ambassador, the embassy in Libreville was established March 20, 1961, with Walker A. Diamanti as Chargé d’Affaires ad interim.

In 1975 the ambassador to Gabon was also accredited to the newly independent nation of São Tomé and Príncipe.