Koeman is preparing for a Nations League clash with Bosnia & Herzegovina in Eindhoven on Saturday
Rohr, who succeeds his former Bordeaux teammate Alain Giresse at the helm of the Panthers, has never managed at international level after a coaching career that also included spells at Nice and Tunisian side Etoile du Sahel.
The 56-year-old was under no illusions about the mammoth task facing him, but said he hoped to entice Europe-based footballers eligible to play for Gabon to join up with the side.
“We are going to try to convince players and their agents that it is sometimes worth more to be a first-team Gabonese international rather than play at amateur level in England or France,” German-born Rohr said.
There was widespread disappointment in the small central African state when the national team was eliminated after the first round of the 2010 Africa Cup of Nations in Angola last month.
As co-hosts with Equatorial Guinea, Gabon automatically qualify for the 2012 Nations Cup.
Koeman is preparing for a Nations League clash with Bosnia & Herzegovina in Eindhoven on Saturday
The 37-year-old, who has 142 caps for his country, made his international debut in 2007
The five-time Ballon d'Or winner failed to score as he appeared at a record sixth European Championship this year, with Portugal exiting in the quarter-finals
A year ago Liverpool reportedly rejected a bid of £150 million from Al Ittihad for the Egyptian striker
Liverpool dominated a United team who could not keep pace with them
In another Premier League clash, striker Alexander Isak secured a 2-1 win for Newcastle United against Tottenham Hotspur
After two rounds of matches in the UAE Pro League, Al Nasr lead the table with six points
Raphinha was one of the players who faced criticism during Barca's trophyless last campaign