Gordon, signed as a free agent earlier this month, played the first half of a fixture sandwiched between the two legs of Celtic's UEFA Champions League third qualifying round tie with Icelandic side KR.
Ronny Deila's men ran out 1-0 winners in the first leg against KR on Tuesday, but were unable to keep a clean sheet on this occasion after moving ahead through Kris Commons' eighth-minute strike.
Commons drilled home from 12 yards after being set up by Teemu Pukki's lay-off.
However, last season's top goalscorer in the Scottish Premiership was forced off before the interval and Deila then made 10 further changes at half-time.
Dresden, relegated from the second tier of German football in May, subsequently found an equaliser as the pace of play dropped in baking-hot conditions.
