However, he will be all out to stop the Arsenal forward netting against his old club on Wednesday night.
Giroud netted 21 goals to helped fire Montpellier to the Ligue One title for the first time in their history last season, before joining Arsenal in a £12million summer transfer.
After a slow start, the France international has slowly grown into his new side, scoring five goals as many appearances.
Girard said: "Olivier worked very hard for us and we almost sculpted him into the player he is today. We made history at the club and had great times.
"Unfortunately for us, he is rediscovering his best form and starting to score goals, but we have tactics to try to stop him.
"We know how good he is, but there are also lots of attacking threats here at Arsenal."
Captain Mapou Yanga-Mbiwa is looking forward to taking on his old team-mate.
The centre-half said: "I know him and he knows me very well.
"We will see how we get on tomorrow [Wednesday], and I will work hard."
Montpellier lost at home to Arsenal on matchday one and their hopes of making it out of Group B are now all but over, sitting bottom with just one point.
Girard said: "I have told the team qualification for the knockout stages is over, but we still have a slight hope of qualification for the Europa League.
"We need to look forward now and build for our Ligue 1 campaign.
"We need to be very solid, to try to get back to our usual form, and up the Ligue 1 table."
The Montpellier manager added: "It is a privilege to play in the Champions League, all of the team dreamt of this and fought for it all of last season.
"It has been quite liberating at times, but we just lacked a touch of experience at certain times in the games.
"We are just trying to find a bit more consistency in our results and a balance in our play."
Montpellier have included Cyril Jeunechamp in Wednesday's squad, despite the defender facing an internal club investigation after punching a French journalist in the face following the 1-1 draw at Valenciennes on Saturday.
"I think things went on the other night, we are going to sort things out internally," said Girard.
"We are not going overboard and will have an inquiry ourselves.
"It is important to have all the information at our disposal so we can give him a sanction if need be
"I do not see why he should not be here today. Going forwards, we will see what happens."